Here is a good resource to check out first
First of all, check what command is run when you in fact launch your app. For me (Create minecraft mod) this command was executed when I run runClient configuration (line breaks, tabs and backslashes added for readability):
/home/tooster/.sdkman/candidates/java/14.0.1-open/bin/java
| // NOTE: I previously suggested doing this through Grunt, but had plenty of problems with | |
| // my set up. Grunt did some weird things with scope, and I ended up using nodemon. This | |
| // setup is now using Gulp. It works exactly how I expect it to and is WAY more concise. | |
| var gulp = require('gulp'), | |
| spawn = require('child_process').spawn, | |
| node; | |
| /** | |
| * $ gulp server | |
| * description: launch the server. If there's a server already running, kill it. |