Ansible gets the job done for me.

I use it to bootstrap new servers (security, dependencies, etc) and deploy apps on them both on prem and vps. I have playbooks and roles for everything I ever needed.

I don't really like it but it's a tool that you can bend to your needs and move along.

Docker Compose. You can have multiple containers for your components (application, server, database, monitoring, analytics, etc.)

Basic ubuntu server with Apache/Nginx/Caddy.

Trafiek is also a popular choice for proxying.

DHH is pushing Kamal.