Restart nginx to make it listen on our fauxvpn interface

Tryfix. Can't run this locally ATM.

nixos/modules/tests/private-storage.nix

@@ -311,6 +311,7 @@ in {
 
       # The issuer metrics should be accessible from the monitoring network.
       $issuer->execute('ifconfig lo:fauxvpn 172.23.23.2/24');
+      $issuer->execute('systemctl restart nginx.service');
       $issuer->succeed('curl --silent --insecure --fail --output /dev/null https://172.23.23.2/metrics');
 
       # The issuer metrics should NOT be accessible from any other network.