A year ago I started a project inspired from sketchbook with multiplayer: GitHub - iErcann/Notblox: 3D Three.JS Multiplayer Game - Cars - Physics - WWW.NOTBLOX.ONLINE
I added cars but will probably change the physics, you can use them in the test world. Always wanted a gta like in the browser but it’s a long process 
all server side, client only renders, hosted in europe for now but you can rehost the server where you want
it’s three.js+rapier