The self-hosted PaaS drawer is not empty. Coolify, Dokploy, CapRover, Dokku, Kamal. If you have wanted a Heroku you actually own, someone has already built you three of them.
Source: [Dev.to](https://dev.to/arshtechpro/openship-your-deployment-tool-shouldnt-compete-with-your-app-for-ram-5a4k)