Works with rune.exe and rune_members.exe from 2001 RSC.
Edit your HOSTS file / DNS resolver to point runescape.com/www.runescape.com to 127.0.0.1.
rune_members.exe requires port 8010 and port 80.
rune.exe requires port 80.
Copy cache/client files to public/client/, update mkfileindex.js if you want to add any new versions.
node mkfileindex.js
npm start