text: Title: Custom template variables in settings
  Body: **Current behaviour**
  Currently, in email templates, Django host URLs are getting populated.
  
  **Better approach**
  If as a developer, I want to handle the email activation through front-end. Then I need to set the pass the front-end URL in templates.
  
  **The solution we can go with:**
  We can set the frontend URL in settings and use that in required places in the package.