The udraw project no longer requires servers for it's API and storage back-end. The NodeJS + Express app has been ported to run inside AWS Lambda & API Gateway with tile storage backed in S3 with an Elasticache Redis sitting in as a tile cache and WebSocket message broker. but....

udraw is a multiplayer drawing application like many other  drawing apps out there which have surfaced since the rise of WebSockets.  Mine happens to expand in size allowing very large drawings on an  (unlimited?) sized surface. Each area of the canvas is broken into  256x256 pixel tiles which are drawn