Extra request to /api_url

[divergentdave]

Two requests are made to https://app.host/api_url on page load. This is because ApiClient is constructed twice, once for the default value passed to createContext(), and once for the value of a useMemo() call, which is passed to a corresponding context provider.

[jbr]

Ideally we'd template the api url into the client or html, but the way we're building the docker images doesn't allow for that