denoland-deno/docs/examples/file_server.md

File server

This one serves a local directory in HTTP.

deno install --allow-net --allow-read https://deno.land/std/http/file_server.ts

Run it:

$ file_server .
Downloading https://deno.land/std/http/file_server.ts...
[...]
HTTP server listening on http://0.0.0.0:4500/

And if you ever want to upgrade to the latest published version:

file_server --reload