Added websocket server

server/src/app.ts

@@ -1,5 +1,6 @@
 import http from 'http'
 import express, { Application } from 'express'
+import {Server as wsServer }  from 'ws'
 import initDebug from 'debug'
 
 import { registerMiddlewares } from './middlewares'
@@ -15,6 +16,7 @@ const PORT = normalizePort(process.env.PORT || '6595')
 
 const debug = initDebug('deemix-gui:server')
 const app: Application = express()
+const ws = new wsServer({ noServer: true })
 const server = http.createServer(app)
 
 /* === Middlewares === */
@@ -34,5 +36,10 @@ app.set('port', PORT)
 server.listen(PORT)
 
 /* === Server callbacks === */
+server.on('upgrade', (request, socket, head) => {
+  ws.handleUpgrade(request, socket, head, socket => {
+    ws.emit('connection', socket, request)
+  })
+})
 server.on('error', getErrorCb(PORT))
 server.on('listening', getListeningCb(server, debug))