Are you using something like dumb-init or equivalent? That's a definite requirement as _not_ having it results in zombie processes hanging around (which do retain some memory footprint). Read more about that here: https://github.com/Yelp/dumb-init#why-you-need-an-init-syste...
I'm using dumb-init for the main node process in my docker container (node in-turn spawns chrome instances via puppeteer as requests come in). Is there a way to use dumb-init for each individual chrome instance as well? Or are you suggesting we make chrome the main container process and start new containers for each session?