Add ghcr build

Author: byrnedo

.github/workflows/publish-ghcr-container.yaml

@@ -5,7 +5,7 @@ on:
       - '*'
 
 env:
-  REGISTRY: ${{ vars.GCR_PREFIX }}
+  REGISTRY: ghcr.io
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
@@ -44,6 +44,12 @@ jobs:
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3
 
+    - name: Login to GHCR
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
 
     - name: Build and export to local docker for testing
       uses: docker/build-push-action@v6
@@ -58,16 +64,10 @@ jobs:
       run: |
         bash postgres-appliance/tests/test_spilo.sh 
 
-    - name: Authenticate to Google Cloud
-      uses: google-github-actions/auth@v1
-      with:
-        credentials_json: '${{ secrets.GCR_CREDENTIALS }}'
-    - run: gcloud auth configure-docker -q gcr.io
-
     - name: Build arm64 additionaly and push multiarch image to ghcr
       uses: docker/build-push-action@v6
       with:
         context: "postgres-appliance/"
         push: true
         tags: "${{ steps.image.outputs.NAME }}"
-        platforms: linux/amd64,linux/arm64
+        platforms: linux/amd64