PM2 ecosystem configs to run a service before running the node process

What's going wrong?

I am not able to configure a working ecosystem file for a node program which requires to run a service before executing the node program.

Basically equivalent configuration for running this command via pm2

xvfb-run -s "-ac -screen 0 1280x720x24" node app.js

How could we reproduce this issue?

1. First install xvdf in your ubuntu 20.04 machine by running - sudo apt-get install xvfb
2. Then run any node program xvfb-run -s "-ac -screen 0 1280x720x24" node app.js. It will work without any issue.
3. Then try any of these configurations as ecosystem.config.js but none of them works (i.e. the process does not start)

module.exports = {
  apps : [
// This one seems to have compiled with a different version of node so crashed
{
    name   : "gl-app",
    cwd: "/home/ubuntu/.nvm/versions/node/v16.20.2/lib/node_modules/@my-org/gl-app",
    script : "cli.js",
    interpreter: "/usr/bin/xvfb-run",
    args: "-s '-ac -screen 0 1280x720x24' /home/ubuntu/.nvm/versions/node/v16.20.2/lbin/node --experimental-modules",
    env: { "MY_VAR": "test" }
},
// Neither does this one work
{
    name   : "gl-app",
    cwd: "/home/ubuntu/.nvm/versions/node/v16.20.2/lib/node_modules/@my-org/gl-app",
    script : "/home/ubuntu/.nvm/versions/node/v16.20.2/lbin/node --experimental-modules cli.js",
    interpreter: "xvfb-run -s "-ac -screen 0 1280x720x24" ",
    args: "",
    env: { "MY_VAR": "test" }
},

// Neither does this one work

{
    name   : "gl-app",
    cwd: "/home/ubuntu/.nvm/versions/node/v16.20.2/lib/node_modules/@my-org/gl-app",
    script : "xvfb-run -s '-ac -screen 0 1280x720x24'  cli.js",
    interpreter: "node@16.20.2",
    args: "--experimental-modules",
    env: { "MY_VAR": "test" }
},

// This one works but does not run `xvfb-run`

{
    name   : "gl-app",
    cwd: "/home/ubuntu/.nvm/versions/node/v16.20.2/lib/node_modules/@my-org/gl-app",
    script : "cli.js",
    interpreter: "node@16.20.2",
    args: "--experimental-modules",
    env: { "MY_VAR": "test" }
}
]

What did I miss?

Start by reproducing the working xvfb-run command and comparing it with the three failing entries in ecosystem.config.js. Check how PM2 interprets script, interpreter, and args; done means establishing a supported configuration or documenting that configuration's limitation.