Server-side (Privacy Center) API calls are blocked when testing locally

[NevilleS]

Bug Description

When running the app locally using any nox commands - but most importantly, using nox -s "fides_env(test)" or fides deploy, there is a FIDES_PRIVACY_CENTER__FIDES_API_URL config var we default to http://localhost:8080/api/v1

This works fine for client-side calls from the browser (both Privacy Center client and the Fides.js client), but these fail when the same call is attempted from the server since it tries to connect to localhost from within the privacy-center docker container.

Steps to Reproduce

1. Run nox -s "fides_env(test)"
2. Open http://localhost:3001/fides.js
3. Observe an Internal Server Error

Expected behavior

Should perform all the server-side initialization and return a fides.js bundle with geolocation and experience prefetched 👍

Environment

• Version: 2.17.0rc1

Additional context

We might need to support an optional FIDES_PRIVACY_CENTER__SERVER_SIDE_FIDES_API_URL (or similar) to workaround this, as I can't think of a nicer way to get the client & server to agree on the API location when they are technically on different networks.

[Roger-Ethyca]

moving to done