It seems that with the newest version of podman container names are no
longer added as hostnames, meaning that any attempt to resolve
hostnames with the current config will fail. `localhost` is probably
more robust anyway, so we switch to that.
The bug manifests as broken services because nextcloud/gitea cannot
resolve their databases and nextcloud fails to resolve the php
server. To fix this a running system, the gitea and nextcloud database
configurations will need to be hand-edited, since those values are
only set on initialization, and not updated when changed later.
Podman pods make this obsolete; though we need to explicitly set
slirp4netns, otherwise podman will not create private network
namespaces for the pods.
