Create build-backend.yml

.github/workflows/build-backend.yml

@@ -0,0 +1,43 @@
+name: Build Backend
+
+on:
+  push:
+    branches: [ "main" ]
+
+env:
+  PROJECT_ID: ${{ secrets.GKE_PROJECT }}
+  GAR_LOCATION: us-central1
+
+jobs:
+  setup-build-publish:
+    name: Setup, Build, Publish
+    runs-on: ubuntu-latest
+    environment: production
+
+    permissions:
+      contents: 'read'
+      id-token: 'write'
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    # Authentication via credentials json
+    - id: 'auth'
+      uses: 'google-github-actions/auth@v1'
+      with:
+        credentials_json: '${{ secrets.GCP_CREDENTIALS }}'
+
+    - name: Docker configuration
+      run: |-
+        echo ${{steps.auth.outputs.access_token}} | docker login -u oauth2accesstoken --password-stdin https://$GAR_LOCATION-docker.pkg.dev
+
+    - name: Set up Taskfile
+      uses: arduino/setup-task@v1.0.3
+
+    - name: Build
+      run: task build-backend-image tag="$GITHUB_SHA"
+
+    # Push the Docker image to Google Artifact Registry
+    - name: Publish
+      run: task push-backend-image tag="$GITHUB_SHA"