Added a simple healthcheck endpoint

app.py

@@ -30,6 +30,10 @@ jwt = JWTManager(app)
 cred = credentials.Certificate(os.getenv("GOOGLE_APPLICATION_CREDENTIALS"))
 firebase_admin.initialize_app(cred)
 
+@app.route('/healthcheck', methods=['GET'])
+def healthcheck():
+    return {"healthy": True}
+
 
 @app.route('/listening_section_1', methods=['GET'])
 @jwt_required()