Add /etc/resolv.conf and /etc/ssl/certs to pages chroot
This MR adds
which implement a wrapper for building a chroot jail with file copy
and directory mount binding.
On top of that
gitlab-pages chroot deamon will now create a complete
/etc/resolv.conf, a copy of
SSL_CERT_FILE placed in
/etc/ssl/ca-bundle.pem, and a bind mount of
SSL_CERT_FILE can be provided by omnibus, see relevant documentation.
Closes #86 (closed)