Figure out the correct way to configure `trust proxy` and `HTTP_FORWARDED_COUNT`

[make-github-pseudonymous-again]

Maybe this has to be configured for Meteor's router, or maybe this is incorrectly applied twice.

This currently does not work in api/healthcheck and api/ics. The consequence is that all requests fall in the same rate-limiting bucket, which is a UX concern as soon as we have more than one user.

See:

• https://expressjs.com/en/api.html#trust.proxy.options.table

[make-github-pseudonymous-again]

Might help to add --full-app tests for token generation/revocation and/or api/ics route tests that check that the requestor IP address is correctly forwarded.

[make-github-pseudonymous-again]

Shower thought: could it be that this does not work because HTTP_FORWARDED_COUNT is a string and not a number?!

patients/server/api/healthcheck/index.ts

Line 13 in 2227751

routes.set('trust proxy', process.env.HTTP_FORWARDED_COUNT);