[server] refactor #1

[KevinNitroG]

Actually it's not the first one

• 1 module 1 controller (can have multiple services)
• [ ] request, response dto (create-user.request.dto.ts)
• User dto return the avatar in URL format
• User update dto shouldn't change PK
• the method in service class needs to be more transparent and more explicit
• ticket has col plan
• should ticket has col that precalc amount in the end of...?
• plan should not be modify (no post, delete, put, patch)
• use swc

  https://docs.nestjs.com/recipes/swc#common-pitfalls