feat: build Docker image locally without pushing to registry

.gitea/workflows/docker-build.yml

@@ -1,4 +1,4 @@
-name: Build and Push Docker Image
+name: Build Docker Image
 
 on:
   push:
@@ -8,7 +8,7 @@ on:
       - main
 
 jobs:
-  build-and-push:
+  build:
     runs-on: ubuntu-latest
     
     steps:
@@ -30,30 +30,22 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Login to Docker Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ vars.DOCKER_REGISTRY || 'docker.io' }}
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-
-      - name: Extract metadata
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ vars.DOCKER_REGISTRY }}/${{ github.repository }}
-          tags: |
-            type=ref,event=branch
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=sha,prefix=sha-
-
-      - name: Build and push Docker image
+      - name: Build Docker image
         uses: docker/build-push-action@v5
         with:
           context: .
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+          push: false
+          load: true
+          tags: configucci:latest
           cache-from: type=gha
           cache-to: type=gha,mode=max
+
+      - name: Save Docker image as tarball
+        run: docker save configucci:latest -o configucci.tar
+
+      - name: Upload Docker image artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: docker-image
+          path: configucci.tar
+          retention-days: 30