fix error.

flask_app/flask_app.py

@@ -17,9 +17,9 @@ app.config['JSON_SORT_KEYS'] = False
 CORS(app, resources={r"/*": {"origins": "*"}})
 
 # 首页路由
-#@app.route("/")
-#def home():
-#    return render_template("index.html", message="欢迎来到 Flask Demo！")
+@app.route("/")
+def home():
+    return render_template("index.html", message="欢迎来到 Flask Demo！")
 
 # 带参数的路由
 @app.route("/hello/<name>")
@@ -44,6 +44,7 @@ def form():
         <a href='./'>返回首页</a>
     """
 
+'''
 # 创建 RESTX API
 api = Api(
     app,
@@ -314,6 +315,8 @@ def not_found(error):
 def internal_error(error):
     return jsonify({'error': '服务器内部错误'}), 500
 
-#if __name__ == '__main__':
-#    port = int(os.getenv('PORT', 5000))
-#    app.run(host='0.0.0.0', port=port, debug=False)
+if __name__ == '__main__':
+    port = int(os.getenv('PORT', 5000))
+    app.run(host='0.0.0.0', port=port, debug=False)
+
+'''