diff --git a/app/channels/application_cable/channel.rb b/app/channels/application_cable/channel.rb
index d672697..3073f1e 100644
--- a/app/channels/application_cable/channel.rb
+++ b/app/channels/application_cable/channel.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module ApplicationCable
   class Channel < ActionCable::Channel::Base
   end
diff --git a/app/channels/application_cable/connection.rb b/app/channels/application_cable/connection.rb
index 0ff5442..1cc97c6 100644
--- a/app/channels/application_cable/connection.rb
+++ b/app/channels/application_cable/connection.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
   end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 7d14012..eda95cc 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class ApplicationController < ActionController::Base
     after_action :set_csrf_cookie
 
diff --git a/app/controllers/expenses_controller.rb b/app/controllers/expenses_controller.rb
index 2692f74..774b87f 100644
--- a/app/controllers/expenses_controller.rb
+++ b/app/controllers/expenses_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class ExpensesController < ApplicationController
   before_action :set_expense, only: %i[ show edit update destroy ]
 
diff --git a/app/controllers/groups_controller.rb b/app/controllers/groups_controller.rb
index 0f489fb..232ac85 100644
--- a/app/controllers/groups_controller.rb
+++ b/app/controllers/groups_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class GroupsController < ApplicationController
   def index
     roots = Group.where(parent_id: nil)
diff --git a/app/controllers/guests_controller.rb b/app/controllers/guests_controller.rb
index 6272dd9..5a1dbb2 100644
--- a/app/controllers/guests_controller.rb
+++ b/app/controllers/guests_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require 'csv'
 
 class GuestsController < ApplicationController
diff --git a/app/controllers/tables_arrangements_controller.rb b/app/controllers/tables_arrangements_controller.rb
index 7d3c371..8523f5a 100644
--- a/app/controllers/tables_arrangements_controller.rb
+++ b/app/controllers/tables_arrangements_controller.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class TablesArrangementsController < ApplicationController
   def index
     @tables_arrangements = TablesArrangement.all.order(discomfort: :asc).limit(10)
diff --git a/app/extensions/tree_node_extension.rb b/app/extensions/tree_node_extension.rb
index fe4f720..630b011 100644
--- a/app/extensions/tree_node_extension.rb
+++ b/app/extensions/tree_node_extension.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module TreeNodeExtension
   def distance_to_common_ancestor(another_node)
     return 0 if self == another_node
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index de6be79..5e869ad 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,2 +1,4 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module ApplicationHelper
 end
diff --git a/app/helpers/expenses_helper.rb b/app/helpers/expenses_helper.rb
index 1d50062..af8a78e 100644
--- a/app/helpers/expenses_helper.rb
+++ b/app/helpers/expenses_helper.rb
@@ -1,2 +1,4 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module ExpensesHelper
 end
diff --git a/app/helpers/groups_helper.rb b/app/helpers/groups_helper.rb
index c091b2f..311c1a2 100644
--- a/app/helpers/groups_helper.rb
+++ b/app/helpers/groups_helper.rb
@@ -1,2 +1,4 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module GroupsHelper
 end
diff --git a/app/helpers/guests_helper.rb b/app/helpers/guests_helper.rb
index 00317bf..ca740f6 100644
--- a/app/helpers/guests_helper.rb
+++ b/app/helpers/guests_helper.rb
@@ -1,2 +1,4 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module GuestsHelper
 end
diff --git a/app/helpers/tables_arrangements_helper.rb b/app/helpers/tables_arrangements_helper.rb
index c066a2e..637e079 100644
--- a/app/helpers/tables_arrangements_helper.rb
+++ b/app/helpers/tables_arrangements_helper.rb
@@ -1,2 +1,4 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module TablesArrangementsHelper
 end
diff --git a/app/jobs/application_job.rb b/app/jobs/application_job.rb
index d394c3d..3498a49 100644
--- a/app/jobs/application_job.rb
+++ b/app/jobs/application_job.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class ApplicationJob < ActiveJob::Base
   # Automatically retry jobs that encountered a deadlock
   # retry_on ActiveRecord::Deadlocked
diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index 3c34c81..94e1656 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class ApplicationMailer < ActionMailer::Base
   default from: "from@example.com"
   layout "mailer"
diff --git a/app/models/application_record.rb b/app/models/application_record.rb
index b63caeb..e93781d 100644
--- a/app/models/application_record.rb
+++ b/app/models/application_record.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class ApplicationRecord < ActiveRecord::Base
   primary_abstract_class
 end
diff --git a/app/models/expense.rb b/app/models/expense.rb
index 15a9560..34e2e33 100644
--- a/app/models/expense.rb
+++ b/app/models/expense.rb
@@ -1,2 +1,4 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class Expense < ApplicationRecord
 end
diff --git a/app/models/group.rb b/app/models/group.rb
index afcadaa..4e12aed 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class Group < ApplicationRecord
   validates :name, uniqueness: true
   validates :name, :order, presence: true
diff --git a/app/models/guest.rb b/app/models/guest.rb
index 4e8bcce..412f01c 100644
--- a/app/models/guest.rb
+++ b/app/models/guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class Guest < ApplicationRecord
   acts_as_taggable_on :affinity_groups, :unbreakable_bonds
   belongs_to :group
diff --git a/app/models/seat.rb b/app/models/seat.rb
index e909587..8395b9c 100644
--- a/app/models/seat.rb
+++ b/app/models/seat.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class Seat < ApplicationRecord
   belongs_to :guest
   belongs_to :table_arrangement
diff --git a/app/models/tables_arrangement.rb b/app/models/tables_arrangement.rb
index 1be3ec3..c3c0797 100644
--- a/app/models/tables_arrangement.rb
+++ b/app/models/tables_arrangement.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class TablesArrangement < ApplicationRecord
   has_many :seats
 end
diff --git a/app/serializers/serializable_group.rb b/app/serializers/serializable_group.rb
index f832475..f7cc103 100644
--- a/app/serializers/serializable_group.rb
+++ b/app/serializers/serializable_group.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class SerializableGroup < JSONAPI::Serializable::Resource
   type 'group'
 
diff --git a/app/serializers/serializable_guest.rb b/app/serializers/serializable_guest.rb
index 647c106..b8d9347 100644
--- a/app/serializers/serializable_guest.rb
+++ b/app/serializers/serializable_guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class SerializableGuest < JSONAPI::Serializable::Resource
   type 'guest'
 
diff --git a/app/services/affinity_groups_hierarchy.rb b/app/services/affinity_groups_hierarchy.rb
index af6c62a..7c87ed9 100644
--- a/app/services/affinity_groups_hierarchy.rb
+++ b/app/services/affinity_groups_hierarchy.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class AffinityGroupsHierarchy < Array
   include Singleton
 
diff --git a/app/services/tables/discomfort_calculator.rb b/app/services/tables/discomfort_calculator.rb
index 69214bb..d6907e8 100644
--- a/app/services/tables/discomfort_calculator.rb
+++ b/app/services/tables/discomfort_calculator.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module Tables
   class DiscomfortCalculator
     private attr_reader :table
diff --git a/app/services/tables/distribution.rb b/app/services/tables/distribution.rb
index 33cb130..b361c70 100644
--- a/app/services/tables/distribution.rb
+++ b/app/services/tables/distribution.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require_relative '../../extensions/tree_node_extension'
 
 module Tables
diff --git a/app/services/tables/swap.rb b/app/services/tables/swap.rb
index 631b49b..9668efb 100644
--- a/app/services/tables/swap.rb
+++ b/app/services/tables/swap.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module Tables
   class Swap
     private attr_reader :initial_solution
diff --git a/app/services/tables/table.rb b/app/services/tables/table.rb
index 1dde7f6..92b0f08 100644
--- a/app/services/tables/table.rb
+++ b/app/services/tables/table.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module Tables
   class Table < Array
     attr_accessor :discomfort
diff --git a/app/services/vns/engine.rb b/app/services/vns/engine.rb
index 5c260aa..00f2c80 100644
--- a/app/services/vns/engine.rb
+++ b/app/services/vns/engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 module VNS
   class Engine
     def target_function(&function)
diff --git a/app/views/expenses/_expense.html.erb b/app/views/expenses/_expense.html.erb
index 6581cb7..5bac9f6 100644
--- a/app/views/expenses/_expense.html.erb
+++ b/app/views/expenses/_expense.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <div id="<%= dom_id expense %>">
   <p>
     <strong>Name:</strong>
diff --git a/app/views/expenses/_form.html.erb b/app/views/expenses/_form.html.erb
index 543a3ef..8d9cd9c 100644
--- a/app/views/expenses/_form.html.erb
+++ b/app/views/expenses/_form.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <%= form_with(model: expense) do |form| %>
   <% if expense.errors.any? %>
     <div style="color: red">
diff --git a/app/views/expenses/edit.html.erb b/app/views/expenses/edit.html.erb
index 75bab6f..032aba0 100644
--- a/app/views/expenses/edit.html.erb
+++ b/app/views/expenses/edit.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <h1>Editing expense</h1>
 
 <%= render "form", expense: @expense %>
diff --git a/app/views/expenses/index.html.erb b/app/views/expenses/index.html.erb
index e63f662..6e4fd28 100644
--- a/app/views/expenses/index.html.erb
+++ b/app/views/expenses/index.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <p style="color: green"><%= notice %></p>
 
 <h1>Expenses</h1>
diff --git a/app/views/expenses/new.html.erb b/app/views/expenses/new.html.erb
index 17d6299..a7b9844 100644
--- a/app/views/expenses/new.html.erb
+++ b/app/views/expenses/new.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <h1>New expense</h1>
 
 <%= render "form", expense: @expense %>
diff --git a/app/views/expenses/show.html.erb b/app/views/expenses/show.html.erb
index 2262a0e..b2bec00 100644
--- a/app/views/expenses/show.html.erb
+++ b/app/views/expenses/show.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <p style="color: green"><%= notice %></p>
 
 <%= render @expense %>
diff --git a/app/views/guests/_form.html.erb b/app/views/guests/_form.html.erb
index eaea454..e2daaf5 100644
--- a/app/views/guests/_form.html.erb
+++ b/app/views/guests/_form.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <%= form_with(model: guest) do |form| %>
   <% if guest.errors.any? %>
     <div style="color: red">
diff --git a/app/views/guests/_guest.html.erb b/app/views/guests/_guest.html.erb
index dfd51e9..ed160f9 100644
--- a/app/views/guests/_guest.html.erb
+++ b/app/views/guests/_guest.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <div id="<%= dom_id guest %>">
   <p>
     <strong>First name:</strong>
diff --git a/app/views/guests/edit.html.erb b/app/views/guests/edit.html.erb
index a024444..d59a8e7 100644
--- a/app/views/guests/edit.html.erb
+++ b/app/views/guests/edit.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <h1>Editing guest</h1>
 
 <%= render "form", guest: @guest %>
diff --git a/app/views/guests/index.html.erb b/app/views/guests/index.html.erb
index d71cfa8..3ef84c4 100644
--- a/app/views/guests/index.html.erb
+++ b/app/views/guests/index.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <p style="color: green"><%= notice %></p>
 
 <h1>Guests</h1>
diff --git a/app/views/guests/new.html.erb b/app/views/guests/new.html.erb
index d05ae72..8405d09 100644
--- a/app/views/guests/new.html.erb
+++ b/app/views/guests/new.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <h1>New guest</h1>
 
 <%= render "form", guest: @guest %>
diff --git a/app/views/guests/show.html.erb b/app/views/guests/show.html.erb
index bcfad6e..6976007 100644
--- a/app/views/guests/show.html.erb
+++ b/app/views/guests/show.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <p style="color: green"><%= notice %></p>
 
 <%= render @guest %>
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index d68b671..4c8aeb2 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <!DOCTYPE html>
 <html>
   <head>
diff --git a/app/views/layouts/mailer.html.erb b/app/views/layouts/mailer.html.erb
index 3aac900..ca6bd25 100644
--- a/app/views/layouts/mailer.html.erb
+++ b/app/views/layouts/mailer.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <!DOCTYPE html>
 <html>
   <head>
diff --git a/app/views/layouts/mailer.text.erb b/app/views/layouts/mailer.text.erb
index 37f0bdd..0b40d6b 100644
--- a/app/views/layouts/mailer.text.erb
+++ b/app/views/layouts/mailer.text.erb
@@ -1 +1,3 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <%= yield %>
diff --git a/app/views/tables_arrangements/index.html.erb b/app/views/tables_arrangements/index.html.erb
index 260e144..b24f7da 100644
--- a/app/views/tables_arrangements/index.html.erb
+++ b/app/views/tables_arrangements/index.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <h1>Tables arrangements</h1>
 
 <ol>
diff --git a/app/views/tables_arrangements/show.html.erb b/app/views/tables_arrangements/show.html.erb
index a2b9aae..cc90581 100644
--- a/app/views/tables_arrangements/show.html.erb
+++ b/app/views/tables_arrangements/show.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024 Manuel Bustillo %>
+
 <h1>ID: <%= @tables_arrangement.id %></h1>
 
 <p>Discomfort: <%= @tables_arrangement.discomfort %></p>
diff --git a/config/application.rb b/config/application.rb
index e21736e..2c1fa72 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require_relative 'boot'
 
 require 'rails'
diff --git a/config/boot.rb b/config/boot.rb
index 988a5dd..b7afb85 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
 
 require "bundler/setup" # Set up gems listed in the Gemfile.
diff --git a/config/environment.rb b/config/environment.rb
index cac5315..6cec499 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # Load the Rails application.
 require_relative "application"
 
diff --git a/config/environments/development.rb b/config/environments/development.rb
index f39246f..49b67a2 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require "active_support/core_ext/integer/time"
 
 Rails.application.configure do
diff --git a/config/environments/production.rb b/config/environments/production.rb
index c39bd29..eb6e7fa 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require "active_support/core_ext/integer/time"
 
 Rails.application.configure do
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 3ada93b..ef2b3a4 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require "active_support/core_ext/integer/time"
 
 # The test environment is used exclusively to run your application's
diff --git a/config/importmap.rb b/config/importmap.rb
index 909dfc5..f84aa44 100644
--- a/config/importmap.rb
+++ b/config/importmap.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # Pin npm packages by running ./bin/importmap
 
 pin "application"
diff --git a/config/initializers/affinity_groups.rb b/config/initializers/affinity_groups.rb
index f52c1d4..1415e8d 100644
--- a/config/initializers/affinity_groups.rb
+++ b/config/initializers/affinity_groups.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 require_relative '../../app/services/affinity_groups_hierarchy'
 
 hierarchy = AffinityGroupsHierarchy.instance
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 2eeef96..f67fe73 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index b3076b3..9004631 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # Be sure to restart your server when you modify this file.
 
 # Define an application-wide content security policy.
diff --git a/config/initializers/cors.rb b/config/initializers/cors.rb
index a908920..f4b450f 100644
--- a/config/initializers/cors.rb
+++ b/config/initializers/cors.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # config/initializers/cors.rb
 
 Rails.application.config.middleware.insert_before 0, Rack::Cors do
diff --git a/config/initializers/filter_parameter_logging.rb b/config/initializers/filter_parameter_logging.rb
index c2d89e2..b5bfef2 100644
--- a/config/initializers/filter_parameter_logging.rb
+++ b/config/initializers/filter_parameter_logging.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # Be sure to restart your server when you modify this file.
 
 # Configure parameters to be partially matched (e.g. passw matches password) and filtered from the log file.
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index 157a851..6633bb9 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections
diff --git a/config/initializers/permissions_policy.rb b/config/initializers/permissions_policy.rb
index 7db3b95..57547a3 100644
--- a/config/initializers/permissions_policy.rb
+++ b/config/initializers/permissions_policy.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # Be sure to restart your server when you modify this file.
 
 # Define an application-wide HTTP permissions policy. For further
diff --git a/config/initializers/ruby_extensions.rb b/config/initializers/ruby_extensions.rb
index f25093d..e515905 100644
--- a/config/initializers/ruby_extensions.rb
+++ b/config/initializers/ruby_extensions.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class Numeric
   def to_currency
     Money.from_amount(self, "EUR").format
diff --git a/config/puma.rb b/config/puma.rb
index afa809b..0e947b4 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # This configuration file will be evaluated by Puma. The top-level methods that
 # are invoked here are part of Puma's configuration DSL. For more information
 # about methods provided by the DSL, see https://puma.io/puma/Puma/DSL.html.
diff --git a/config/routes.rb b/config/routes.rb
index d1697bc..d96c9c9 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 Rails.application.routes.draw do
   resources :groups, only: :index
   resources :guests do
diff --git a/db/migrate/20240711175425_create_expenses.rb b/db/migrate/20240711175425_create_expenses.rb
index 63d0f2b..cdac7d0 100644
--- a/db/migrate/20240711175425_create_expenses.rb
+++ b/db/migrate/20240711175425_create_expenses.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class CreateExpenses < ActiveRecord::Migration[7.1]
   def change
     create_enum :pricing_types, ["fixed", "per_person"]
diff --git a/db/migrate/20240711180753_create_guests.rb b/db/migrate/20240711180753_create_guests.rb
index 1280006..ca3f85b 100644
--- a/db/migrate/20240711180753_create_guests.rb
+++ b/db/migrate/20240711180753_create_guests.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class CreateGuests < ActiveRecord::Migration[7.1]
   def change
     create_table :guests, id: :uuid do |t|
diff --git a/db/migrate/20240711181626_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb b/db/migrate/20240711181626_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb
index 8b97ba6..803f800 100644
--- a/db/migrate/20240711181626_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181626_acts_as_taggable_on_migration.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 1)
diff --git a/db/migrate/20240711181627_add_missing_unique_indices.acts_as_taggable_on_engine.rb b/db/migrate/20240711181627_add_missing_unique_indices.acts_as_taggable_on_engine.rb
index ebd46fd..7fe34a2 100644
--- a/db/migrate/20240711181627_add_missing_unique_indices.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181627_add_missing_unique_indices.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 2)
diff --git a/db/migrate/20240711181628_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb b/db/migrate/20240711181628_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
index d17afe8..a329d5d 100644
--- a/db/migrate/20240711181628_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181628_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 3)
diff --git a/db/migrate/20240711181629_add_missing_taggable_index.acts_as_taggable_on_engine.rb b/db/migrate/20240711181629_add_missing_taggable_index.acts_as_taggable_on_engine.rb
index 52f696b..4548054 100644
--- a/db/migrate/20240711181629_add_missing_taggable_index.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181629_add_missing_taggable_index.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 4)
diff --git a/db/migrate/20240711181630_change_collation_for_tag_names.acts_as_taggable_on_engine.rb b/db/migrate/20240711181630_change_collation_for_tag_names.acts_as_taggable_on_engine.rb
index 47fd928..d0ff9c4 100644
--- a/db/migrate/20240711181630_change_collation_for_tag_names.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181630_change_collation_for_tag_names.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 5)
diff --git a/db/migrate/20240711181631_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb b/db/migrate/20240711181631_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb
index f5aaaf9..194dea4 100644
--- a/db/migrate/20240711181631_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181631_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 6)
diff --git a/db/migrate/20240711181632_add_tenant_to_taggings.acts_as_taggable_on_engine.rb b/db/migrate/20240711181632_add_tenant_to_taggings.acts_as_taggable_on_engine.rb
index b62b660..23cb9f8 100644
--- a/db/migrate/20240711181632_add_tenant_to_taggings.acts_as_taggable_on_engine.rb
+++ b/db/migrate/20240711181632_add_tenant_to_taggings.acts_as_taggable_on_engine.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # frozen_string_literal: true
 
 # This migration comes from acts_as_taggable_on_engine (originally 7)
diff --git a/db/migrate/20240724181756_create_tables_arrangements.rb b/db/migrate/20240724181756_create_tables_arrangements.rb
index c05f6dc..ac69487 100644
--- a/db/migrate/20240724181756_create_tables_arrangements.rb
+++ b/db/migrate/20240724181756_create_tables_arrangements.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class CreateTablesArrangements < ActiveRecord::Migration[7.1]
   def change
     create_table :tables_arrangements, id: :uuid do |t|
diff --git a/db/migrate/20240724181853_create_seats.rb b/db/migrate/20240724181853_create_seats.rb
index 74f5b7b..b28c9d0 100644
--- a/db/migrate/20240724181853_create_seats.rb
+++ b/db/migrate/20240724181853_create_seats.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class CreateSeats < ActiveRecord::Migration[7.1]
   def change
     create_table :seats, id: :uuid do |t|
diff --git a/db/migrate/20240811142121_create_groups.rb b/db/migrate/20240811142121_create_groups.rb
index 0246978..b21f067 100644
--- a/db/migrate/20240811142121_create_groups.rb
+++ b/db/migrate/20240811142121_create_groups.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class CreateGroups < ActiveRecord::Migration[7.1]
   def change
     create_table :groups, id: :uuid do |t|
diff --git a/db/migrate/20240811143801_add_parent_to_group.rb b/db/migrate/20240811143801_add_parent_to_group.rb
index 575af38..c8a3a14 100644
--- a/db/migrate/20240811143801_add_parent_to_group.rb
+++ b/db/migrate/20240811143801_add_parent_to_group.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class AddParentToGroup < ActiveRecord::Migration[7.1]
   def change
     add_reference :groups, :parent, type: :uuid, index: true, foreign_key: { to_table: :groups }
diff --git a/db/migrate/20240811154115_add_group_to_guest.rb b/db/migrate/20240811154115_add_group_to_guest.rb
index d4e2bd4..f1fcdaf 100644
--- a/db/migrate/20240811154115_add_group_to_guest.rb
+++ b/db/migrate/20240811154115_add_group_to_guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class AddGroupToGuest < ActiveRecord::Migration[7.1]
   def change
     add_reference :guests, :group, null: false, foreign_key: true, type: :uuid
diff --git a/db/migrate/20240811170021_add_status_to_guest.rb b/db/migrate/20240811170021_add_status_to_guest.rb
index cd7be5b..de51170 100644
--- a/db/migrate/20240811170021_add_status_to_guest.rb
+++ b/db/migrate/20240811170021_add_status_to_guest.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 class AddStatusToGuest < ActiveRecord::Migration[7.1]
   def change
     add_column :guests, :status, :integer, default: 0
diff --git a/db/schema.rb b/db/schema.rb
index c4145db..1c81149 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
diff --git a/db/seeds.rb b/db/seeds.rb
index 391d6e1..09d33f7 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024 Manuel Bustillo
+
 NUMBER_OF_GUESTS = 50
 
 TablesArrangement.delete_all