https://pypi.org/project/textstat/
https://github.com/greghub/website-launch-checklist
https://github.com/marcobiedermann/search-engine-optimization
https://developers.google.com/speed/docs/insights/v5/get-started
https://developers.google.com/search/apis/indexing-api/v3/prereqs
https://developer.chrome.com/docs/lighthouse/overview/#cli