initial commit
express js and index.js initial set up

Express initalizes `app` to be a handler that you can give to a HTTP
server.
Route handler at `/` that's called when we hit homepage
We make server listen on port 3000

You can run `node index.js` now to see example
Take browser to `localhost:3000`
Merge remote-tracking branch 'socket/master'
Move socket tutorial into this play repo.

I did this because I want to see if I can have different projects
in the same repository for easy searching and learning as these are
not personal projects