Don't inline JS source maps into production bundle

The application's JS bundle at https://hive.blog/ is huge, because it contains JS source maps. Current JS load size is about 32.5MB resources and 7.9MB transferred (brotli compressed), see screenshot:

This causes unnecessary penalty for non-developer users, who don't care about source maps. We shouldn't inline JS source, but deliver it in separate files, which still can be read by developers, but won't affect average users.