# create a password file for "testuser" and "testpassword"
docker run --entrypoint htpasswd httpd:2.4 -Bbn testuser testpassword > httpd.htpasswd
# Create another one for "testuserpush" and "testpasswordpush"
docker run --entrypoint htpasswd httpd:2.4 -Bbn testuserpush testpasswordpush >> httpd.htpasswd

# Create your group file
echo "pusher: testuserpush" > httpd.groups