Ruby on Rails Backend Template
- GET [/api/user] : getAll
- GET [/api/user/:id] : findById (params: id)
- POST [/api/user/avatar] : uploadAvatar (body: id, avatar)
- POST [/api/auth/signup] : sign_up (body: email, name, username, password, avatar)
- POST [/api/auth/login] : login (body: email, password)