title: how can I use separate database for every application in django
body: <p>I have app1 and app2, I wanna app1 use db1 and app2 use db2</p>
  
  <p>the approach I found is to using database router, a little bit complicated</p>
  
  <p>I wanna know is there any simple way?</p>
  
  <p>Can I just config it in settings.py</p>