Add Possibility for API prefix

[TheMrPhantom]

Is it possible to add a prefix to the backend API to enable a reverse proxy filter to distinguish between frontend and backend requests without subdomains?
My understanding is that the backend can only be hosted on an additional domain. However, I need the backend to be under mydomain.com/api/some-endpoint and the frontend to be under mydomain.com.

[TheMrPhantom]

Adding root_path="/api" should do the trick according to the fastapi docu: https://fastapi.tiangolo.com/advanced/behind-a-proxy/#checking-the-current-root_path

bracket/backend/bracket/app.py

Lines 108 to 119 in a99ee6c

	app = FastAPI(
	title="Bracket API",
	docs_url="/docs",
	version="1.0.0",
	lifespan=lifespan,
	summary="API for Bracket, an open source tournament system.",
	description=description,
	license_info={
	"name": "AGPL-3.0",
	"url": "https://www.gnu.org/licenses/agpl-3.0.en.html",
	},
	)

The root path should be settable via an optional environment variable.