Validate older links

[FDiskas]

Probably some cron or something is needed to mark all invalid urls.

[yamalight]

I'm not sure it's needed. The point here is to preserve episodes history, if some of the links go bad - that's fine IMO 🤔

[FDiskas]

Broken links are bad for seo

[yamalight]

Eh, that's not my target here. I'd rather have worse SEO, but preserve history as-is 🤔

[FDiskas]

Links could be also checked at build time :)

[FDiskas]

https://www.gatsbyjs.org/packages/gatsby-remark-check-links/