title: Import an HTML file into an other HTML file
body: <p>I would like to know how to import an HTML file into an other HTML file.</p>
  
  <p>Both files refer to a lot of different files, so I would prefer to keep them into two different folders instead of copying one file into the other.</p>
  
  <hr>
  
  <p>For now, I'm developing locally, with Django.</p>