macOS runs a service on port 5000 by default. this doesn't actually
prevent the backend server from *starting*, or the rate limiter proxy
from working, but it *does* mean that when the backend restarts, if the
proxy sends a request, it will stop working until it's restarted.
the easiest way to work around this is by just changing the port the
backend listens on. this does not change the ports used in the docker
configuration.
the /users/{id} prefix contains most API routes so it's not a good idea
to put a single rate limit on *all* of them combined. the rate limiter
will now ignore the /users/{id} prefix *if* there's a second {id}
parameter in the URL.
also, X-RateLimit-Bucket is no longer hashed, so it can be directly
decoded by clients to get the actual bucket name. i'm not sure if this
will actually be useful, but it's nice to have the option.
