rollback to django

[otivedani]

kemarin ada wacana wagtail tidak jadi dipakai, jadi mungkin sebelum dimulai di-rollback terlebih dahulu wagtailnya.

[tegarimansyah]

I will take this

• [x] Install django
• [x] Split settings to base, dev and prod
• [ ] Docker-based development and deployment - will do this in another PR
• [ ] Readme how to contribute - will do this in #19