(1) Use the Running Schedulizer guide to run the server
(2) Make your changes
(3) Run JUnit tests (just have to run the TestSuite at IntelliJ or run mvn test)
(4) Install jshint npm install -g jshint
(5) Run jshint by executing the script checkStyle.sh and make sure there are no style errors.
(6) Commit your changes and create a pull request
(7) You can get more information about the code at our wiki.