There's an easy #CTF flag on my personal website: https://memorici.de
Actually, I make #CTF challenges for every website I make and put them there as easter eggs.
I want someone to get this particular one so bad.
The reason is that the challenge that I made for my personal website is also personal. It's a tale of an old friend who has passed, memories of teenage years and, really, the quintessence of the meaning behind the domain name.
As I said, I would rate this challenge as easy, in #CTF terms, it doesn't involve actual hacking or even API interactions, whereas the challenge that I put on https://doma.dev is likely to be hard or at least intermediate.
Good hunting, if you are up for it. And if you know of some random websites with flags, ping me.