Merge pull request 'Configure build and cache for intermediate layers' (#203) from optimize-docker-build into main

Reviewed-on: #203

.gitea/workflows/build.yml

@@ -1,8 +1,6 @@
 name: Build Nginx-based docker image
 on:
   push:
-    branches:
-      - main
 concurrency:
   group: ${{ github.ref }}
   cancel-in-progress: true
@@ -24,13 +22,22 @@ jobs:
           registry: ${{ secrets.PRIVATE_REGISTRY_HOST }}
           username: ${{ secrets.PRIVATE_REGISTRY_USERNAME }}
           password: ${{ secrets.PRIVATE_REGISTRY_TOKEN }}
-        
-      - name: Build and push
+
+      - name: Build and push intermediate stages (build)
         uses: docker/build-push-action@v6
         with:
           context: .
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: |
-            ${{ secrets.PRIVATE_REGISTRY_HOST }}/${{ env.GITHUB_REPOSITORY }}:latest
-          cache-from: type=registry,ref=user/app:latest
+          target: build
+          push: ${{ github.ref == 'refs/heads/main' }}
+          tags: ${{ secrets.PRIVATE_REGISTRY_HOST }}/${{ env.GITHUB_REPOSITORY }}:build
+          cache-from: type=registry,ref=${{ secrets.PRIVATE_REGISTRY_HOST }}/${{ env.GITHUB_REPOSITORY }}:build
+          cache-to: type=inline
+
+      - name: Build and push (final)
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: ${{ github.ref == 'refs/heads/main' }}
+          tags: ${{ secrets.PRIVATE_REGISTRY_HOST }}/${{ env.GITHUB_REPOSITORY }}:latest
+          cache-from: type=registry,ref=${{ secrets.PRIVATE_REGISTRY_HOST }}/${{ env.GITHUB_REPOSITORY }}:latest
           cache-to: type=inline