text: Title: How to change the structure of the app
  Body: Hi @miguelgrinberg thanks for your great e-book about the app.
  Now I want to reconstruct the app.
  when I access the app, I found that I should sign in firstly the app and then I can see the posts in app.
  Now I want to change this.
  I mean when users firstly access the site, the posts or blog should be seen at the Home or explore webpage even they haven't sign in the app. After they click posts or user, the sign up should be required.
  Do you have advices how to get this or what parts should be changed. thanks!