Ask HN: Best tech stack/process for soloprenuer to build and ship quickly?

If the goal is to ship, then use what you already know.

it's really depends on that you are trying to build but in general you need to use tools you know and you can save some time by using PaaS services like 'heroku' because those will allow to focus on your product code instead of infrastructure and also you have to only write code that not possible to outsource to external services/solutions.

Contact me if you want deeper consultant service.

That may not be enough to go on, to be frank, as your app may ultimately determine your requirements.

Does the world really need a new app per week, or a few good ones every so often?

The C programming language

is this a serious question ? :-)