README.md: document Gradle build

README.md

@@ -1,6 +1,16 @@
 # iets3.opensource
 
 ## Build instructions
-1. go to `code/languages`
-2. copy `build.properties.examples` to `build.properties` and adapt
-3. run `ant` from `code/languages`
+### Using Ant
+1. Go to `code/languages`
+2. Copy `build.properties.examples` to `build.properties` and adapt
+3. Run `ant` from `code/languages`
+
+### Using Gradle
+If you just want to build the project, no prerequisites are required. Just run `./gradlew build` from the checkout
+directory. This will download a pre-built version the mbeddr platform from the itemis Nexus repository.
+
+To publish this project's artifacts to the Maven local repository run `./gradlew publishToMavenLocal`.
+
+If you want to use a custom version of `mbeddr` with Gradle, publish its artifacts to the local Maven repository
+(consult mbeddr documentation).