[Chapter]

  - author --> relation
  - title --> text
  - chapter --> big text
  - image --> file
  - arc --> relation
  - number --> number
  - published_at --> date
  - views --> number
  - active --> Boolean

[Arc]

  - name --> text
  - number --> number
  - image --> file

[author]

  - user --> relation
  - name --> CharField
  - description --> CharField
  - image --> file
  - Facebook --> URL
  - Instagram --> URL
  - Twitter --> URL