yesterday i did few YunoHost system updates on my Raspi and today all my subdomains where all my apps are installed are not reachable.
that is what i see in the diagnosis:
DNS resolution seems to be working, but it looks like you're using a custom `/etc/resolv.conf`.
* The file `/etc/resolv.conf` should be a symlink to `/etc/resolvconf/run/resolv.conf` itself pointing to `127.0.0.1` (dnsmasq). If you want to manually configure DNS resolvers, please edit `/etc/resolv.dnsmasq.conf`.