title: sitemaping in google search console not working because backend is hosted in another url
body: <p>i have this site where i create new url based on new questions asked
  i am trying to index the new url created to sitemap.txt and add it to googles search console</p>
  <p>i am generating new urls and new sites urls are being written in backend in to a file called sitemap.txt but i dont know how to connect it to  googles search console</p>
  <p>i have my front end in firebase made with react js and backend is experess.js and is hosted in heroku
  my site url is  <a href="https://wixten.com" rel="nofollow noreferrer">https://wixten.com</a> and i have added this url to googles serch console</p>
  <p>the periodicaly  generated  sitemap.txt is in express.js as in img</p>
  <p>in the seccond img u can see that i have added  <a href="https://askover.herokuapp.com/sitemap.txt" rel="nofollow noreferrer">https://askover.herokuapp.com/sitemap.txt</a>
  in <a href="https://wixten.com" rel="nofollow noreferrer">https://wixten.com</a> googleserch console
  what am i doing wrong here and how can i set such that new urls added will be re cralled by googles serch bots to index in google</p>
  <p><a href="https://i.stack.imgur.com/woPzx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/woPzx.png" alt="sitemap in express.js" /></a></p>
  <p><a href="https://i.stack.imgur.com/YdS9x.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YdS9x.png" alt="enter image description here" /></a></p>