Add build instructions? about thingsboard-udp-loadbalancer HOT 5 OPEN

[INFO] Changes detected - recompiling the module!
[INFO] Compiling 21 source files to /usr/src/mymaven/application/target/classes
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] ThingsBoard UDP Load Balancer ...................... SUCCESS [  1.025 s]
[INFO] ThingsBoard UDP Load Balancer Application .......... FAILURE [ 48.955 s]
[INFO] ThingsBoard UDP Load Balancer Microservices ........ SKIPPED
[INFO] ThingsBoard UDP Load Balancer Server Microservice .. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 54.219 s
[INFO] Finished at: 2021-11-11T18:18:54+00:00
[INFO] Final Memory: 19M/281M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project application: Fatal error compiling: invalid flag: --release -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :application

[~/Code/thingsboard-udp-loadbalancer] [±master✔] 
$ docker run -it --rm --name tb-udp-lb -v "$(pwd)":/usr/src/mymaven -w /usr/src/mymaven maven:3.8.3-jdk-11 mvn clean package