[zerof1l]

I get the impression that the person who wrote this article doesn't know much about docker. Running 2 apps and a certbot can be done without containers easily. Try running 20 apps, some of which depend on having the same dependency but on a different version.

Regarding security, it depends on how you set up your containers. If you just run them all with default settings - the root user; and give them all the permissions, then yeah, quite insecure. But if you spend an extra minute and create a new non-root user for each container and restrict the permissions then it's quite secure. There are plenty of docker hardening tutorials.

Regarding ease of setup, it took me a while to learn docker. Setting up first containers took very long time. But now, it's quick and easy. I have templates for the docker compose file and I know how to solve all the common issues.

Regarding ease of management, it's very easy. Most of my containers is setup once and forget. Upgrading an app just requires changing the version in the docker-compose file.