Could you share more, please? I use the very same stack and I think with the biggest VPS available right now I will have more than enough. It is basically a simple CRUD application.
Could you share how big the VPS yo used is (cores/Ram) and what traffic you got to manage with that?
Not the parent but to me dokku shines when putting multiple apps on a single server and the fact that deploying is a git push. Letsencrypt and other plugins are icing on the cake.
If you have one app then dedicate a server to it and run it right on the operating system. Maybe have 2 and a load balancer so you can do prod deployments with no downtime. The point is get dokku, docker, and all that abstraction between the network card and your app out of the way.
Could you share how big the VPS yo used is (cores/Ram) and what traffic you got to manage with that?
Thanks.