[gitea] Moves database password into an sops secret

system/hosts/mcp/vars.nix

@@ -1,12 +1,10 @@
-{ config, lib, ...}:
+{ lib, ...}:
 {
   options = with lib; with types; {
-    domainName = mkOption { type = str; };
     localNet = mkOption { type = str; };
   };
 
   config = {
-    domainName = "havenisms.com";
     localNet = "192.168.0.0/16";
   };
-}
+}