ci: add build and push workflow

Author: echozio

.github/workflows/build-push.yaml

@@ -0,0 +1,19 @@
+name: Build and Push Container Image
+on:
+  release:
+    types: [published]
+
+jobs:
+  build-push:
+    name: Build and Push Container Image
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Build and Push
+      uses: stafftastic/docker-build-push-action@main
+      with:
+        name: commit-status-poster
+        project: stafftastic
+        repository: images
+        serviceAccountKey: ${{secrets.GOOGLE_ARTIFACT_REGISTRY_SA_KEY}}