Not a tutorial but here's a project that goes over the architecture of building one using best practices. You may not need everything in it (so take from it wha

Not a tutorial but here's a project that goes over the architecture of building one using best practices. You may not need everything in it (so take from it what you will), but it should be helpful: https://github.com/ardanlabs/service https://github.com/ardanlabs/service