Follow-up to #90

Probably it needs extra match rule to test url rewrite for .br files for js/css assets

Docs https://unit.nginx.org/configuration/#static-files

Refs

• https://docs.platform.sh/create-apps.html#response-compression
• https://www.drupal.org/docs/contributed-modules/advanced-cssjs-aggregation/advanced-aggregates#brotli
• https://developer.chrome.com/docs/lighthouse/performance/uses-text-compression/
• https://www.drupal.org/project/drupal/issues/3184242