Add GCP deployment

.github/workflows/deploy-app-engine.yaml

@@ -0,0 +1,68 @@
+name: Deploy to GCP App Engine
+
+on: [push]
+
+concurrency:
+  group: "ae"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [latest]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies
+        run: yarn --frozen-lockfile
+      - name: Build
+        run: npm test
+      - name: Generate deployment package
+        run: zip -r deploy.zip . -x '*.git'
+      - name: Upload deployment package artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: app-engine
+          path: deploy.zip
+
+  deploy:
+    if: ${{ github.ref == 'refs/heads/main' }}
+    runs-on: ubuntu-latest
+    needs: build
+    environment:
+      name: gcp-app-engine
+      url: https://descent.live
+    permissions:
+      contents: 'read'
+      id-token: 'write'
+    steps:
+      - name: Authenticate to GCP
+        uses: google-github-actions/auth@v1
+        with:
+          workload_identity_provider: ${{ vars.GCP_WORKLOAD_IDENTITY_PROVIDER }}
+          service_account: ${{ vars.GCP_SERVICE_ACCOUNT }}
+          project_id: ${{ vars.GCP_PROJECT_ID }}
+      - name: Download deployment package artifact
+        uses: actions/download-artifact@v3
+        with:
+          name: app-engine
+      - name: Unzip deployment package
+        run: unzip deploy.zip
+      - name: Cleanup build files
+        run: rm -rf deploy.zip .git
+      - name: Deploy to GCP App Engine
+        uses: google-github-actions/deploy-appengine@v1
+        with:
+          env_vars: |-
+            HUE_CLIENT=${{ vars.HUE_CLIENT }}
+            HUE_ID=${{ vars.HUE_ID }}
+            HUE_SECRET=${{ secrets.HUE_SECRET }}
+            LASTFM_POLL_INTERVAL=${{ vars.LASTFM_POLL_INTERVAL }}
+            OPENWEATHERMAP_KEY=${{ secrets.OPENWEATHERMAP_KEY }}
+            SPOTIFY_CLIENT=${{ vars.SPOTIFY_CLIENT }}
+            SPOTIFY_SECRET=${{ secrets.SPOTIFY_SECRET }}

app.yaml

@@ -0,0 +1,5 @@
+runtime: nodejs20
+instance_class: F1
+automatic_scaling:
+  max_instances: 1
+  min_instances: 1

server.js

@@ -566,4 +566,4 @@ async function getWeatherOpenweathermap(key, lat, lon, units, callback) {
 
 /* Application runtime */
 
-app.listen(process.env.DESCENT_PORT || 3000);
+app.listen(process.env.DESCENT_PORT || process.env.PORT || 3000);