Merge pull request #75 from rwth-acis/master

Fix for running websocket using dockerfile

bin/server.js

@@ -29,6 +29,6 @@ server.on('upgrade', (request, socket, head) => {
   wss.handleUpgrade(request, socket, head, handleAuth)
 })
 
-server.listen({ host, port })
-
-console.log(`running at '${host}' on port ${port}`)
+server.listen(port, () => {
+  console.log(`running at '${host}' on port ${port}`)
+})