We're using the "tenants" subfolder for consistency with the folder
structure we use in ActiveStorage and because some CONSUL installations
might have folders inside the `data` folder which might conflict with
the folders created by tenants.
Note that the Python scripts have a lot of duplication, meaning we need
to change all of them. I'm not refactoring them because I'm not familiar
enough with these scripts (or with Python, for that matter).
Also note that the scripts folder is still shared by all tenants,
meaning it isn't possible to have different scripts for different
tenants. I'm not sure how this situation should be handled; again, I'm
not familiar enough with this feature.
Note that the `sitemap:refresh` task only pings search engines at the
end, so it only does so for the `Sitemap.default_host` defined last. So
we're using the `sitemap:refresh:no_ping` task instead and pinging
search engines after creating each sitemap.
Note we're pinging search engines in staging and preproduction
environments. I'm leaving it that way because that's what we've done
until now, but I wonder whether we should only do so on production.
Since we're creating a new method to get the current url_options, we're
also using it in the dev_seeds.
Note there's a difference between gitignore and dockerignore; in
.gitignore, files without a leading slash match files in every folder,
while in .dockerignore, they match files in the root folder
