[gitea] Enable code indexing

lib/modules/gitea/default.nix

@@ -29,6 +29,10 @@ in {
       repository = {
         ENABLE_PUSH_CREATE_USER = true;
       };
+      indexer = {
+        REPO_INDEXER_ENABLED = true;        
+        REPO_INDEXER_EXCLUDE = "**.pdf, **.png, **.jpeg, **.jpm, **.svg, **.webm";
+      };
     };
   };