Using API, env vars can't be set for daemon spawn process

[jgresham]

What's going wrong?

pm2.connect() doesn't accept env vars for when a new daemon https://pm2.keymetrics.io/docs/usage/pm2-api/

How could we reproduce this issue?

N/A

Supporting information

Code location where the env vars should be passed on to child_process.spawn https://github.com/Unitech/pm2/blob/master/lib/Daemon.js#L49 I may try to implement if pm2 team says this feature would be welcomed. Optionally, we could just implement passing an options object directly to the spawn call