Nextcloud uses a _client-side_ (Javascript) redirect to navigate the
browser to its `index.php`. The page it serves with this redirect is
static and will often load successfully, even if there is a problem with
the application. This causes the Blackbox exporter to record the site
as "up," even when it it definitely is not. To avoid this, we can
scrape the `index.php` page explicitly, ensuring that the application is
loaded.
https://20125.home/ is the URL the Status Android application loads in
its main WebView. This site is powered by a server that generates a
custom page showing the status of our self-hosted applications, based on
alerts retrieved from the AlertManager API.
Android WebView does not allow cleartext HTTP connections. It does,
however, allow connecting an HTTPS server and ignoring the certificate
it presents, which is effectively the same thing. Thus, we generate a
self-signed certificate for the Ingress for this site.
Dustin