Yep I've got an index.js file that creates a simple API gateway via a basic switch() on the url pathname. Then individual files for each function. Bundle them into a single script with webpack and copy that into the Workers UI (there's an API for deployment too... eg can use Serverless Framework).

1MB max size, max 5-50ms CPU time, max 128MB RAM: https://developers.cloudflare.com/workers/writing-workers/re...

That said I've got a worker script running a pass-through websocket to GraphQL origin server and it keeps the connection open.

I'm doing authentication within the worker too. Long-term I can see ability to run absolutely everything there: microservices, GraphQL server (Apollo has a beta), auth, static SPA files, SSR etc. $0.50 per million calls ($5/mth minimum). And they intend to be within 10ms ping of 99% of the global population.

If they can workout how to do databases on the edge (they're working on it), then I can see a future where you could build scalable apps that serve millions of users for maybe less than $100/mth across the entire stack.