As others mentioned, there's a variety of products to handle these by now for corporations and startups. I'm actually more interested in the same question but

As others mentioned, there's a variety of products to handle these by now for corporations and startups. I'm actually more interested in the same question but for personal projects where you don't want to pay or pay no more than say $1/mo. Is there a solution for that? Maybe a hashicorp consul self-hosted? A lot of work to set up for personal project but maybe worth it to do one time?