Directory "data" not populated in Docker

[lechten]

I followed those instructions: https://github.com/solid/node-solid-server#use-docker

git clone https://github.com/solid/node-solid-server
cd node-solid-server
docker build -t node-solid-server .
docker run -p 8443:8443 --name solid node-solid-server

Visiting https://localhost:8443/ then leads to this:

No ACL found for https://localhost:8443/, searched in 
- https://localhost:8443/.acl

The directory /usr/src/app/data/localhost inside the container is empty. What can be done here?