Add minimum required versions

doc/user/packages/maven_repository/index.md

@@ -34,6 +34,11 @@ using Maven and understand how to build your own packages, move onto the
 
 ### Installing Maven
 
+The required minimum versions are:
+
+- Java 11.0.5+
+- Maven 3.6+
+
 Follow the instructions at [maven.apache.org](https://maven.apache.org/install.html)
 to download and install Maven for your local development environment. Once
 installation is complete, verify you can use Maven in your terminal by running: