fix uvicorn issue

app.py

@@ -25,7 +25,6 @@ import time
 import json
 
 app = Flask(__name__, static_url_path='/static')
-app.secret_key = 'test'
 
 @app.route("/validate_learning", methods=['GET'])
 def load_learning():
@@ -237,6 +236,6 @@ def hometest():
         return redirect(url_for('data'))
 
 if __name__ == '__main__':
-    #app.run(debug=True)
-    from waitress import serve
-    serve(app, host="0.0.0.0", port=8080)
+    app.run(debug=True)
+    # from waitress import serve
+    # serve(app, host="0.0.0.0")