Keep testing image local

.github/workflows/ci.yml

@@ -28,28 +28,6 @@ jobs:
       - uses: pre-commit-ci/[email protected]
         if: always()
 
-  docker:
-    name: Build and push testing Docker image
-    needs: pre_commit
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Login to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ vars.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Build and push
-        uses: docker/build-push-action@v6
-        with:
-          push: true
-          tags: ${{ env.IMAGE_TAG_TESTING }}
-          cache-from: type=registry,ref=${{ env.IMAGE_TAG_TESTING }}
-          cache-to: type=inline
-
   source:
     name: Extract example source files
     needs: pre_commit
@@ -67,13 +45,28 @@ jobs:
             ./justfile
           if-no-files-found: error
 
-  render:
-    name: Render default files and update Docker tags
-    needs:
-      - docker
-      - source
+  docker:
+    name: Build and push testing Docker image
+    needs: source
     runs-on: ubuntu-latest
     steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ vars.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and export to Docker
+        uses: docker/build-push-action@v6
+        with:
+          load: true
+          tags: ${{ env.IMAGE_TAG_TESTING }}
+          cache-from: type=registry,ref=${{ env.IMAGE_TAG }}
+          cache-to: type=inline
+
       - name: Download source files
         uses: actions/download-artifact@v4
         with:
@@ -99,14 +92,17 @@ jobs:
           username: ${{ vars.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Update Docker tag
-        run: |
-          docker image tag ${{ env.IMAGE_TAG_TESTING }} ${{ env.IMAGE_TAG }}
-          docker image push ${{ env.IMAGE_TAG }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: ${{ env.IMAGE_TAG }}
+          cache-from: type=registry,ref=${{ env.IMAGE_TAG }}
+          cache-to: type=inline
 
   publish:
     name: Publish to GitHub pages
-    needs: render
+    needs: docker
     runs-on: ubuntu-latest
     permissions:
       contents: write