Point readme to compiling file so we don't have to update two places.

Author: wizjany

README.md

@@ -23,10 +23,7 @@ A Bukkit server implementation (such as [Paper](https://papermc.io)) and the [Wo
 Compiling
 ---------
 
-The project is written for Java 17 and our build process makes use of
-[Gradle](http://gradle.org).
-
-Dependencies are automatically handled by Gradle.
+See [COMPILING.md](COMPILING.md).
 
 Contributing
 ------------