Backend creation, first drop

[ArthurBeaulieu]

Main objective is to setup a backend, of the techno you want, which will :

• Serve the assets and tree folder to be exposed ;
• Create a database and associated table for each pages
• Use this db to expose an API for the front to get those data from database instead of json files

In order to give you a hint on the data formatting and on the amount of required tables, please check the assets/json/README.md file, which gives a reference for what is needed for the front to work as of today.

Reach me if you have any questions on this as I'm use to the data formatting and might give you helpful hints about why it has to match this structure

[Asiberus]

For expo photography, remove price and store it in front side.