server - release / publish a version

[Keyang]

As a user, I should be able to release / publish a version through server endpoints.

App could retrieve latest version and download code according to its configuration

Related to: #6 -- CLI could publish a new app version #5 -- App script should connect to the endpoints to retrieve latest version and download configs.

[Keyang]

2 endpoints needed:

PUT /project -- be able to update project with newer version number / url / update method
GET /project/:id -- be able to retrieve project info by its id