Only configure Docker if it is present on the system

migrations/1754984734.sh

@@ -1,5 +1,6 @@
 echo "Configure Docker to use the host's DNS resolver"
 
+if cmd-present docker; then
   # If the daemon configuration has been changed since we wrote it, leave it as-is
   ORIGINAL_CONFIG='{"log-driver":"json-file","log-opts":{"max-size":"10m","max-file":"5"}}'
 
@@ -19,3 +20,4 @@ echo -e '[Resolve]\nDNSStubListenerExtra=172.17.0.1' | sudo tee /etc/systemd/res
 
   sudo systemctl restart systemd-resolved
   sudo systemctl restart docker
+fi