feat(config): enhance CrateDocs MCP server configuration

- Changed `ExecStart` to bind the server to `127.0.0.1` and added explicit `http` scheme.
- Removed unnecessary trailing whitespace across the file for cleaner formatting.

config.nix

@@ -5,41 +5,41 @@ in
 {
   options.services.cratedocs-mcp = {
     enable = lib.mkEnableOption "CrateDocs MCP server";
-    
+
     port = lib.mkOption {
       type = lib.types.int;
       default = 3000;
       description = "Port to listen on for HTTP/SSE server";
     };
-    
+
     user = lib.mkOption {
       type = lib.types.str;
       default = "cratedocs-mcp";
       description = "User to run the service as";
     };
-    
+
     group = lib.mkOption {
       type = lib.types.str;
       default = "cratedocs-mcp";
       description = "Group to run the service as";
     };
   };
-  
+
   config = lib.mkIf cfg.enable {
     systemd.services.cratedocs-mcp = {
       description = "CrateDocs MCP server";
       after = [ "network.target" ];
       wantedBy = [ "multi-user.target" ];
-      
+
       serviceConfig = {
-        ExecStart = "${lib.getExe pkgs.cratedocs-mcp} --port ${toString cfg.port}";
+        ExecStart = "${lib.getExe pkgs.cratedocs-mcp} http -a 127.0.0.1:${toString cfg.port}";
         Restart = "always";
         User = cfg.user;
         Group = cfg.group;
         DynamicUser = true;
         StateDirectory = "cratedocs-mcp";
         CacheDirectory = "cratedocs-mcp";
-        
+
         # Security hardening
         PrivateTmp = true;
         ProtectSystem = "strict";
@@ -64,4 +64,4 @@ in
       };
     };
   };
-}
+}