Update app.py

app.py

@@ -10,6 +10,15 @@ app = Flask(
     static_folder=os.path.join(base_dir, 'static')
 )
 
+from fastapi import FastAPI
+
+app = FastAPI()
+
+@app.get("/")
+def greet_json():
+    return {"Hello": "World!"}
+
+
 @app.route('/')
 def home():
     return render_template('index.html')