Missing requirement in flask app [BUG]

[bar2011]

Bug Description
When building the flask-app Dockerfile there seems to be no problem, but after running a container created from it, it shows the following error:
Traceback (most recent call last): File "./app.py", line 1, in <module> from flask import Flask, render_template File "/usr/local/lib/python3.8/site-packages/flask/__init__.py", line 7, in <module> from .app import Flask as Flask File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 28, in <module> from . import cli File "/usr/local/lib/python3.8/site-packages/flask/cli.py", line 18, in <module> from .helpers import get_debug_flag File "/usr/local/lib/python3.8/site-packages/flask/helpers.py", line 16, in <module> from werkzeug.urls import url_quote ImportError: cannot import name 'url_quote' from 'werkzeug.urls' (/usr/local/lib/python3.8/site-packages/werkzeug/urls.py)
Bug Fix
Add Werkzeug==2.2.2 to /flask-app/requirements.txt