Add websocket/redis node.js server

[brotobot]

Add node.js express socket.io server Connection with redis Use django rest api token for auth to websocket Listen redis messages :

• progress : id, pourcent
• complete : id
• fail : id
• pending : id

[yomguy]

@clementgerard1 we have a privilege pb at runtime:

websockets_1  | > websockets@0.0.1 dev
websockets_1  | > npm install && babel-watch server.js
websockets_1  | 
websockets_1  | glob error [Error: EACCES: permission denied, scandir '/root/.npm/_logs'] {
websockets_1  |   errno: -13,
websockets_1  |   code: 'EACCES',
websockets_1  |   syscall: 'scandir',
websockets_1  |   path: '/root/.npm/_logs'
websockets_1  | }

Trying USER root in websockets/Dockerfile doesn't fix it.