Custom css is not rendered correctly in flask

Question

I have updated the base url of the flask application.

app.py

app = Flask(__name__)
@app.route(f'{root}' + '/')
def index():
........
.......
return render_template('index.html')

Application directory structure:

/app
   /static
       /style.css
   /template
       /index.html
   app.py

I have placed my custom style.css file under static folder. When i ran the application under console in developer tools there is an error which is not allowing to render the style.css

error: https://domain/static/style.css

The actual url has to point https://domain/f'{root}'/static/style.css

the code in index.html:

To access style.css

<link rel="stylesheet" href="{{url_for('static', filename='style.css')}}">

Question How to redirect the style.css url as mentioned above https://domain/f'{root}'/static/style.css without modifying the style.css directory path ?

Help would be appreciated, Thanks