I suppose it’s possible but as you seem to imply, that seems like the wrong approach. It seems like you’d want express to launch workers or use a pool of workers, rather than launching workers that then load express. At least, that’s my intuition.
It’s linked in the first sentence.
Oh, hey, this is probably what you’re looking for if you want to approach it from the ground up rather than the approach here: https://medium.com/@ghaiklor/how-nodejs-works-bfe09efc80ca