Simple instructions about the heroku server

[adrian200223]

Just as I was confused about the Voice Server field (specially in regards to the port), other people may be too.

I added a line creating an example of what the Voice Server field would look like if you deployed the app on heroku.

Edited for better wording

[OhMyGuus]

If the port that the server uses is 80 u don't have to define it in the client, the voice server URL is then http://crewlink.herokuapp.com not crewlink.herokuapp.com:80 like u stated in your change.

[adrian200223]

If the port that the server uses is 80 u don't have to define it in the client, the voice server URL is then http://crewlink.herokuapp.com not crewlink.herokuapp.com:80 like u stated in your change.

"crewlink.herokuapp.com:80" is also valid. "crewlink.herokuapp.com" is translated to the respective IP (via DNS) and then the port used is 80 (same with a http get request). Both forms are valid.

I did not try "crewlink.herokuapp.com" because I thought I had to specify the port (I now know 80 is the default). Also, including https:// is optional (did not know that as well).

I just thoght that this documentation needed an example to all newbies like me. I think it could be good to specify that:
"crewlink.herokuapp.com", "crewlink.herokuapp.com:80" and "https://crewlink.herokuapp.com" are valid examples.