Documentation/link not up to date

[Polve]

Reading the readme to try to setup a regtest node I followed the link:
https://lbry.tech/resources/regtest-setup

But it gives error 404.

Also, when trying to subscribe to the technical newsletter I get this error: "this endpoint is deprecated"

[Polve]

Another problem is that https://lbry.science/ gives cloudflare error with invalid certificate