chore: Revert "feat: Use new web server by default (#2182)" (#2187)

There is an issue found in the new web server, so we couldn't use it by
default for now.
This reverts commit b3f3259b14.

src/main/Main.cpp

@@ -57,7 +57,7 @@ try {
                 return EXIT_FAILURE;
             }
             app::ClioApplication clio{gClioConfig};
-            return clio.run();
+            return clio.run(run.useNgWebServer);
         },
         [](app::CliArgs::Action::Migrate const& migrate) {
             if (not app::parseConfig(migrate.configPath))