The following gist contain information regarding setting up environment for remote code debugging on docker.

Jar Debugging

#mvn run on a particular port
mvn jetty:run -D jetty.port=9229

#mvn debug
export MAVEN_OPTS="-Xdebug -Xnoagent  -Xrunjdwp:transport=dt_socket,address=0.0.0.0:9090,server=y,suspend=n"

#visual studio debug config

{
    "version": "0.2.0",
     "configurations": [
   
       {
         "type": "java",
         "name": "Debug (Launch)",
         "request": "launch",
         "mainClass": "",
         "args": ""
       },
       {
         "type": "java",
         "name": "Debug (Attach)",
         "request": "attach",
         "hostName": "localhost",
         "port": 9090
       }
     ] 
   }