Update Docker Image workflow

.github/workflows/docker-image.yml

@@ -2,7 +2,9 @@ name: Docker Image CI
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ['main']
+  pull_request:
+    branches: ['main']
 
 jobs:
   build:
@@ -13,22 +15,28 @@ jobs:
       packages: write
 
     steps:
-      - uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v3
 
-      - uses: docker/login-action@v2.2.0
+      - name: Login to GitHub Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
         with:
           registry: ghcr.io
           username: ${{github.actor}}
           password: ${{secrets.GITHUB_TOKEN}}
 
-      - uses: docker/metadata-action@v4.6.0
+      - name: Extract metadata
+        uses: docker/metadata-action@v4
         id: meta
         with:
-          images: ghcr.io/groceries
+          images: ghcr.io/jamsch0/groceries
+          tags: type=raw,value=latest,enable={{is_default_branch}}
 
-      - uses: docker/build-push-action@v4.1.1
+      - name: Build and push
+        uses: docker/build-push-action@v4
         with:
           context: .
-          push: true
+          push: ${{github.event_name != 'pull_request'}}
           tags: ${{steps.meta.outputs.tags}}
           labels: ${{steps.meta.outputs.labels}}