Getting the socket to work on localhost

Hi,

I'm trying to get this template to work for localhost development, but so far I've been unsuccessful.

So far, I've taken the following steps:
1. modify `wrangler.toml` to include my `accound_id`
2. change the websocket protocol from `wss` to `ws` for running on localhost
3. run `wrangler dev`

However, when visit http://127.0.0.1:8787/ it throws a 400 as it's missing the upgrade header.

Any ideas on how to get rid of this? We want to try using webworker sockets for a multiplayer functionality at Candu, but I'm stuck on how to get setup on localhost development.