title: Firebase Functions with other hostings
body: <p>Is it possible to use firebase functions from not only firebase hosting?</p>
  
  <p>For example i will want to use hosting on iPage or siteground or anything else, is it possible to still use firebase functions, currently using it for sitemap.</p>
  
  <p>If not possible to use it, any good idea how to replace generating sitemap?</p>
  
  <p>Thanks for help.</p>