Week 1 14.02 -> 21.02

Initialize the backend.
- Spring boot init.
- Create one route /hello that returns "Hello World".
- Separate the Controllers, Repository and Services in sub-pacakges.
- Setup the API to be generic regarding version on routes.
Initialize the frontend
- React.
- Show the results of GET /hello on the front.
Write a README that explain how to run the server and frontend for dev.

Features

Write an API contract.
- Add a Swagger endpoint to the API
As a user, i'd like to select the rank I am currently playing.
As a user, i'd like to select the plane I am currently playing.
- I need an endpoint to list all my planes : GET /planes.
- I need an endpoint : GET /planes?rank=1 rank is optional.
- I need an endpoint : GET /planes/{name} whic
As a user, i'd like to select the enemy plane I wish to have informations about.

I want tot challenge the data structure.