Remove hardcoded address from ws example. (#2204)
Remove hardcoded address from ws example. (#2204)

With a hard coded address on the client, the app no longer works when deploying, which is annoying since there's a handy 'deploy now' button on the readme.

By removing the hard coded address socket.io will connect to the location host automatically so it works both on development and production.
azukaru/next.js,BlancheXu/test,BlancheXu/test,flybayer/next.js,BlancheXu/test,giacomorebonato/next.js,JeromeFitz/next.js,JeromeFitz/next.js,zeit/next.js,kpdecker/next.js,arunoda/next.js,zeit/next.js,flybayer/next.js,zeit/next.js,flybayer/next.js,azukaru/next.js,callumlocke/next.js,nelak/next.js,JeromeFitz/next.js,JeromeFitz/next.js,azukaru/next.js,azukaru/next.js,flybayer/next.js