short docs in readme about local development

README.md

@@ -187,6 +187,17 @@ See the [Linux Guide](https://github.com/rfresh2/ZenithProxy/wiki/Linux-Guide) f
 
 Current limits are documented in [a discord channel](https://discord.com/channels/1127460556710883391/1200685719073599488)
 
+### Development
+
+I highly recommend using Intellij for building and running local development instances.
+
+Gradle will automatically install the required Java version for compiling (currently Java 23)
+
+Most useful gradle tasks:
+* `run` - Builds and runs a local dev instance
+* `jarBuild` - Builds an executable jar to `build/libs/ZenithProxy.jar`
+* `build` - Compiles and runs tests without building a jar
+
 ## Special Thanks
 
 * [Pork2b2tBot Contributors](https://github.com/PorkStudios/Pork2b2tBot/graphs/contributors)