update to use docker actions templates

Author: Luis Corales

.github/workflows/publish-image-ghcr.yml

@@ -6,33 +6,34 @@ on:
   pull_request:
     branches: [main]
 
-env:
-  IMAGE_NAME: ghtoken_product_demo
-
 jobs:
   build_container:
     name: Build Docker image
+    if: github.event_name == 'pull_request'
     runs-on: ubuntu-20.04
     steps:
-      - name: Check out the repo
-        uses: actions/checkout@v3
-      
-      - name: Build Container image
-        run: docker build . --tag $IMAGE_NAME
+      - name: Build the image
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          tags: user/app:latest
 
   push_to_registry:
     name: Push Docker image to Github Container Registry
     if: github.event_name == 'release'
     runs-on: ubuntu-20.04
     needs: [build_container]
     steps:
-      - uses: docker/login-action@v2
+      - name: Login to GHCR
+        uses: docker/login-action@v2
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      
-      - name: Push image to GHCR
-        run: |
-          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME:${{ github.run.id }}
-          docker push $IMAGE_ID
+
+      - name: Build and push image to GHCR
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          tags: user/app:latest