Switch from Gunicorn to Uvicorn with ASGI wrapper for Azure deployment

Author: seligj95

infra/main.bicep

@@ -62,7 +62,7 @@ resource appService 'Microsoft.Web/sites@2024-04-01' = {
     httpsOnly: true
     siteConfig: {
       linuxFxVersion: 'PYTHON|3.12'
-      appCommandLine: 'python -m gunicorn --bind=0.0.0.0:8000 --workers=2 --timeout=600 main:app'
+      appCommandLine: 'python -m uvicorn main:app --host 0.0.0.0 --port 8000'
       appSettings: [
         {
           name: 'SECRET_KEY'

main.py

@@ -11,11 +11,26 @@
 from src.app import create_app  # noqa: E402
 from src.models import db  # noqa: E402
 
-app = create_app()
+# Create Flask app
+flask_app = create_app()
 
 # Initialize database tables
-with app.app_context():
+with flask_app.app_context():
     db.create_all()
 
+# Create ASGI app for Uvicorn
+from werkzeug.middleware.proxy_fix import ProxyFix  # noqa: E402
+flask_app.wsgi_app = ProxyFix(
+    flask_app.wsgi_app, x_for=1, x_proto=1, x_host=1, x_prefix=1
+)
+
+# For Uvicorn
+try:
+    from asgiref.wsgi import WsgiToAsgi  # noqa: E402
+    app = WsgiToAsgi(flask_app)
+except ImportError:
+    # Fallback: use Flask directly
+    app = flask_app
+
 if __name__ == '__main__':
-    app.run(debug=False, host='0.0.0.0', port=8000)
+    flask_app.run(debug=False, host='0.0.0.0', port=8000)

requirements.txt

@@ -2,7 +2,8 @@ Flask==3.0.0
 Flask-CORS==4.0.0
 Flask-SQLAlchemy==3.1.1
 SQLAlchemy==2.0.23
-gunicorn==21.2.0
+uvicorn==0.24.0
+asgiref==3.7.2
 python-dotenv==1.0.0
 azure-identity==1.15.0
 azure-keyvault-secrets==4.8.0