Fixes Dockerfile
Fixes Dockerfile

Although it has needed a whole new Docker container to go with it. In
this case, it closes #2525

MasterDuke17/doc,tbrowder/doc,perl6/doc,perl6/doc,tbrowder/doc,tbrowder/doc,tbrowder/doc,perl6/doc,MasterDuke17/doc,MasterDuke17/doc,MasterDuke17/doc,perl6/doc,perl6/doc