You can use the following sources of information:
1) AWS Amazon Linux image with pre-installed TURN server, you can copy and adjust the configuration and read the notes in that distribution.
2) Links on the front page of the project.
3) Wiki pages.
The most important options in TURN AWS for WebRTC:
1) external -ip
2) fingerprint
3) lt-cred-mech
4) user
Also, if you are going to have lots of users (several thousands or more), adjust the ulimit for the turnserver process.
Regards,
Oleg