title: redirect from one flask app to another flask app on local host
body: <p>I have two flask apps running on local host and different port, 5000 and 5001.
  first i'm running the flask app on port 5000 and then if my condition of flask app 1 satisfies , i want to redirect it to index.html running on port number 5001.</p>
  
  <p>i have tried return render_template('<a href="http://localhost:5001/index.html" rel="nofollow noreferrer">http://localhost:5001/index.html</a>') but it gives an error 
  jinja2.exceptions.TemplateNotFound: <a href="http://localhost:5001/index.html" rel="nofollow noreferrer">http://localhost:5001/index.html</a></p>