Can't create simple reverse proxy with file provider, keep getting 404

Here is an easy reproducible example:

# Creates a dummy port on port 5000
./ &
# Start traefik reverse proxy from 80/443 to 5000.

All I'm getting is a 404 page not found.

Version:      2.0.5
Codename:     montdor
Go version:   go1.13.4
Built:        2019-11-14T18:11:01Z
OS/Arch:      linux/amd64

My fault. Stupid typo. Check the commits on the repo if you are interested in my stupidity.