fix(ci): update dev image build process and run tests in the same job

.gitea/workflows/test.yml

@@ -8,7 +8,6 @@ on:
 
 env:
   REGISTRY: git.arthurerlich.de
-  DEV_IMAGE: git.arthurerlich.de/${{ gitea.repository }}:ci-${{ gitea.sha }}
 
 jobs:
   build-dev:
@@ -27,17 +26,30 @@ jobs:
           username: ${{ gitea.actor }}
           password: ${{ secrets.REGISTRY_TOKEN }}
 
-      - name: Build and push dev image (PHP 8.4 + composer deps)
+      - name: Build dev image (PHP 8.4 + composer deps)
         uses: docker/build-push-action@v5
         with:
           context: .
           file: Dockerfile.dev
           target: dev
-          push: true
+          load: true
-          tags: ${{ env.DEV_IMAGE }}
+          tags: graph-dev:ci
           cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ gitea.repository }}:buildcache-dev
           cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ gitea.repository }}:buildcache-dev,mode=max
 
+      - name: Run tests in dev image
+        run: |
+          cid=$(docker create graph-dev:ci sh -c "
+            composer install --no-interaction &&
+            vendor/bin/phpunit --testdox &&
+            composer phpstan
+          ")
+          docker cp . "$cid":/app
+          rc=0
+          docker start -a "$cid" || rc=$?
+          docker rm "$cid" > /dev/null
+          exit $rc
+
   build-prod:
     needs: build-dev
     runs-on: ubuntu-latest
@@ -48,6 +60,13 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Log in to Gitea registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+
       - name: Build prod image (final target)
         uses: docker/build-push-action@v5
         with:
@@ -55,21 +74,5 @@ jobs:
           file: Dockerfile
           target: final
           push: false
-
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ gitea.repository }}:buildcache-prod
-  test:
+          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ gitea.repository }}:buildcache-prod,mode=max
-    needs: build-dev
-    runs-on: ubuntu-latest
-    container:
-      image: ${{ env.DEV_IMAGE }}
-      credentials:
-        username: ${{ gitea.actor }}
-        password: ${{ secrets.REGISTRY_TOKEN }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Run tests
-        run: |
-          composer install --no-interaction
-          vendor/bin/phpunit --testdox
-          composer phpstan