starlette/docs/staticfiles.md

Starlette also includes a StaticFiles class for serving a specific directory:

• StaticFiles(directory) - Serve any files in the given directory.

You can combine this ASGI application with Starlette's routing to provide comprehensive static file serving.

from starlette.routing import Router, Mount
from starlette.staticfiles import StaticFiles


app = Router(routes=[
    Mount('/static', app=StaticFiles(directory='static')),
])

Static files will respond with "404 Not found" or "405 Method not allowed" responses for requests which do not match.