[seanwilson]

I would say Google's Search Engine Optimization (SEO) Starter Guide is essential for frontend developers: https://support.google.com/webmasters/answer/7451184?hl=en

I maintain my own guide of concise webdev tips that's mostly distill from and links to recommendations from OWASP, Mozilla and Google which you might find a good jumping-off point: https://www.checkbot.io/guide/