Dokku is fine and is great at what it does - running an Heroku-like on your own hosted server. I ran a hobby project for over a year without any serious problem

Dokku is fine and is great at what it does - running an Heroku-like on your own hosted server. I ran a hobby project for over a year without any serious problems on top of a cheap Digital Ocean droplet. It doesn't really have a story for when you want to scale up though - for example moving to multiple web servers behind a load balancer with your databases on some other vms. So it's great for side projects and demos, less so for anything you want to run in serious production mode.