GH workflow to build Docker image

.github/workflows/build-deploy.yaml

@@ -0,0 +1,36 @@
+name: Build Docker Image
+
+on:
+  push:
+    branches: ["main"]
+env:
+  PROJECT_ID: formfree-400917
+  REGION: us-central1
+  GAR_LOCATION: us-central1-docker.pkg.dev/formfree-400917/images/dwn-server
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - id: "auth"
+        name: "Authenticate with Google Cloud"
+        uses: "google-github-actions/auth@v1"
+        with:
+          credentials_json: "${{ secrets.GCP_SERVICE_ACCOUNT_KEY }}"
+          token_format: "access_token"
+
+      - uses: "docker/login-action@v1"
+        name: "Docker login"
+        with:
+          registry: "us-central1-docker.pkg.dev"
+          username: "oauth2accesstoken"
+          password: "${{ steps.auth.outputs.access_token }}"
+
+      - name: Build image
+        run: docker build . --tag ${{ env.GAR_LOCATION }}:${{github.sha}}
+
+      - name: Push image
+        run: docker push ${{ env.GAR_LOCATION }}:${{github.sha}}