Javascript game help

I have just recently started to create a javascript game called "matching game". It is my first javascript game, I now want to improve it by making it a mutliplayer game in that it will switch between two players. If they where to get a match then they get to go again.

Was wondering if anyone able help me in recomending any good websites that could assist me in completing my game

Is there anyone able to recomend any websites that would help me assist in completing my game, in order to try make it a multiplayer, thanks