Add wiki article to README

Author: derrod

README.md

@@ -3,12 +3,12 @@
 An implementation of the server-side component of OAuth for use with OBS Studio.  
 Written in Rust for some reason.
 
-(Currently not in production)
-
 Requires the following secrets to be set via wrangler (`wranger secret put <name>`):
 * `TWITCH_ID`
 * `TWITCH_SECRET`
 * `RESTREAM_ID`
 * `RESTREAM_SECRET`
 
-**Note:** For third-party use the redirect URLs in `wrangler.toml` must be adjusted accordingly and OBS has to be recompiled with the URLs changed.
+**Note:** For third-party use the redirect URLs in `wrangler.toml` must be adjusted accordingly and OBS has to be
+compiled with the appropriate `OAUTH_BASE_URL`.  
+See the relevant [OBS Studio Wiki article](https://github.com/obsproject/obs-studio/wiki/Using-Custom-OAuth-Credentials) for more info.