How do you monitor your side projects?

Hi, I'm Nevin, an indy hacker who has built readable.so while in college. I've generated around $2k arr in revenue so far, and I'm trying to build a new product which helps indy hackers monitor their applications.

I have some questions so I can hopefully help you guys out with my product:

What product do you run (please send a link! I'd be happy to chat with you about your product)
Which tools do you use to monitor your it in production?
What's the biggest annoyance you have with the current tools?

I'd be happy to custom build a solution for anyone, looking forward to hearing your answers.