At the docker-compose.yml, there are specified ~/public_html are linked into container DocumentRoot.
Up damp with commandline with replacing docker-compose.yml
$ curl -s -L -o - https://raw.githubusercontent.com/yousan/damp/master/docker-compose.yml | sed -e 's/# - ~\/public_html:\/var\/www\/vhosts/ - ~\/public_html:\/var\/www\/vhosts/g' | docker-compose -f - up
Also down
$ curl -s -L -o - https://raw.githubusercontent.com/yousan/damp/master/docker-compose.yml | sed -e 's/# - ~\/public_html:\/var\/www\/vhosts/ - ~\/public_html:\/var\/www\/vhosts/g' | docker-compose -f - down
this is test