Add a workflow to deploy the server to Google App Engine

Author: maxbbraun

.github/workflows/deploy-server.yml

@@ -0,0 +1,30 @@
+name: Deploy Server to Google App Engine
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - 'server/**'
+      - '.github/workflows/deploy-server.yml'
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Authenticate to Google Cloud
+      uses: google-github-actions/auth@v2
+      with:
+        project_id: ${{ secrets.GOOGLE_CLOUD_PROJECT_ID }}
+        credentials_json: ${{ secrets.GOOGLE_CLOUD_CREDENTIALS }}
+
+    - name: Deploy to App Engine
+      uses: google-github-actions/deploy-appengine@v2
+      with:
+        project_id: ${{ secrets.GOOGLE_CLOUD_PROJECT_ID }}
+        working_directory: ./server