OptionalconfiguredMjapiUrl: stringThe configured MJAPI URL (MJAPI_URI).
That URL with no trailing slash, or undefined when none is configured. On undefined, each
caller keeps its pre-#5674 behaviour, so a host that has not set MJAPI_URI sees no change. Those legacy
fallbacks exist only for such hosts; do not add new ones.
The URL of the MJAPI server a browser was told about, for routes other than GraphQL (MJ #5674).
MJAPI can live anywhere: its own host and port (
http://localhost:4000), or behind a path on the app's host (https://host/api,https://host/api/v2). Browser code uses whatever it is told (MJAPI_URIin Explorer's environment) and never works it out. GraphQL has its own URL (GRAPHQL_URI), because Apollo can listen on any path.