next.js

338f80b4 - fix empty externals list, pnpm special case, and project path (#56402)

fix empty externals list, pnpm special case, and project path (#56402) ### What? * node.js doesn't allow module requests starting with `.` since node.js 18, so we need to remove out .pnpm special case * externals should be resolvable from the project dir instead of the root dir * fix a problem when the list of externals is empty ### Why? ### How? Closes WEB-1703