[BUG] serving the api under a subdirectory

[saleemalharir1]

main.py
needs to have

app = FastAPI(
    root_path="/subdirectoryi",
    title=swagger_settings.swagger_title,
    description = swagger_settings.swagger_description,
    version=swagger_settings.swagger_version,
)

i suggest to add it commented out and with explination next to it and update the documents to reflect this
thanks to @Andreufb he is the one who walked me through this

[rbardaji]

Hi Saleem and Andreu,

Why do we need this?

[saleemalharir1]

Hey @rbardaji
I faced this issue and thought to add it to documentation since someone might want to serve the api under a subdirectory and not at the root of there server