Users api typo in url

[GroovySmoothie]

I just started playing around with this project and noticed that in the users api it says to post to:

http://localhost:8080/api/v0/user

However the route actually uses "users".
Additionally, the express server is set to use port 3000 instead of 8080.

This url worked for me:

http://localhost:3000/api/v0/users

[Preetam007]

@GroovySmoothie could you raise a pull request