This role sets up a nginx virtual host to publish the encoded previews over http, to allow the sreview frontend to use them.
Everything is in the
Main variables are:
sreview.wwwhostname: Public hostname under which the previews are to be made available via https.
sreview.wwwroot: Directory where the previews are made available by sreview.
letsencrypt_well_known_dir: Directory where to store the
/.well-known/data for the Let’s Encrypt challenge.