Update README.md

@@ -8,3 +8,18 @@ Requires `protocol` repo to exist at the same level as this repo to generate pro
 
 1. Download webrtc sources from https://webrtc.googlesource.com/src
 2. Add sources to Android Studio by pointing at the `webrtc/sdk/android` folder.
+
+## Publishing releases
+
+1. Ensure you have your `.gradle/gradle.properties` filled with the requisite credentials:
+
+````
+nexusUsername=<sonatype username>
+nexusPassword=<sonatype password>
+signing.keyId=<signing key id>
+signing.password=<signing key password>
+signing.secretKeyRingFile=<signing pgp key path>
+````
+
+2. Update `VERSION_NAME` in `gradle.properties` to reflect the release version.
+3. Run `gradle publish closeAndReleaseRepository` to upload to maven.