More nginx config dehardcoding. Did some sshd hardening.

services/containers.nix

@@ -18,6 +18,8 @@ mkIf (elem "containers" config.machine.services) {
           ../pkgs/nixpkgs.nix
           ../pkgs/pkgsets.nix
         ];
+      services.nixosManual.showManual         = false;
+      services.ntp.enable                     = false;
       };
   };
 }