Find means to discern where "system node libs" are, add to module.paths in playwright_server

[teodesian]

          There's probably a better way to figure out how to consult "system node" modules.  npm config ls -l seems in the right neighborhood?. npx-import seems like a crazy solution to the problem.

I generally use NVM and that just sets the node lib env correctly.
I'll file a follow up about this.

Originally posted by @teodesian in #63 (comment)