BTW, this is also kinda how Sliplane started. We both are coming from a freelancing background and had built similar things for clients before

That's the best kind of start, you know it's a useful thing when you've build similar things before when freelancing.

I'm currently building a similar service but for 'serverless functions' (hate that terminology to be honest), so not long running containers but one off tasks. Similar to AWS Lambda and the likes.