feat: add rootPartition option to userdata

configuration.nix

@@ -59,7 +59,10 @@ in
     '';
   };
 
-  fileSystems."/".options = [ "noatime" ];
+  fileSystems."/" = {
+    device = lib.mkIf (config.selfprivacy.server.rootPartition != null) (lib.mkForce config.selfprivacy.server.rootPartition);
+    options = [ "noatime" ];
+  };
 
   services.selfprivacy-api.enable = true;
 

selfprivacy-module.nix

@@ -97,6 +97,11 @@ with lib;
         description = "Server provider that was defined at the initial setup process.";
         type = types.str;
       };
+      rootPartition = mkOption {
+        description = "Root partition to use.";
+        type = types.nullOr types.str;
+        default = null;
+      };
     };
     #########
     #  SSH  #