Use systemd-resolved's stub resolver (#2150)

* Fix comment

* Use systemd-resolved's stub resolver

On first run, symlink systemd-resolved's resolver into /etc/resolv.conf

Matches migration 1754984623

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Co-authored-by: David Heinemeier Hansson <david@hey.com>

install/first-run/dns-resolver.sh

@@ -0,0 +1,4 @@
+# https://wiki.archlinux.org/title/Systemd-resolved
+echo "Symlink resolved stub-resolv to /etc/resolv.conf"
+
+sudo ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf