[Frappe Docker] Unable to Log In into Traefik

I follow this example.
Everything is up and running, but I’m unable to log in into https://traefik.my-domain.com with admin/changeit.

Password is changeit. My traefik.env file contains HASHED_PASSWORD='\$apr1\$MQG0/ftv\$V.I2yIDAsYukh0KX7qCq9.'.

I have been trying for hours to solve the issue. So far without success. Does anyone have any ideas?

Solved. Using sed -e s/\\$/\\$\\$/g instead of sed 's/\$/\\\$/g' does the trick (see Traefik Basic Auth).