Add p service for pastes

Reviewed-by: Aleix Boné <abonerib@bsc.es>
Reviewed-by: Aleix Roca Nonell <aleix.rocanonell@bsc.es>

m/tent/configuration.nix

@@ -12,6 +12,7 @@
     ./gitlab-runner.nix
     ./gitea.nix
     ../hut/public-inbox.nix
+    ../module/p.nix
   ];
 
   # Select the this using the ID to avoid mismatches
@@ -32,6 +33,8 @@
     defaultGateway = "10.0.44.1";
   };
 
+  services.p.enable = true;
+
   services.prometheus.exporters.node = {
     enable = true;
     enabledCollectors = [ "systemd" ];