Ask HN: How do you build your dashboards?

Hey guys, I want to build a dashboard to track some key metrics for my SaaS side project. I am thinking about tracking revenue, usage, and # of people on a waitlist + a couple of extra random things. I am thinking about building this admin dashboard myself but curious to know if someone has any other suggestions.

My question for HN -> what do you use to build your dashboard? Also curious to know what do you include in your dashboards? [ screenshots welcome (-: ]