[tcgv]

> why use Docker at all?

We have a simple cloud infrastructure. Last year, we moved all our legacy apps to a Docker-based deployment (we were already using Docker for newer stuff). Nothing fancy—just basic Dockerfile and docker-compose.yml.

Advantages:

- Easy to manage: we keep a repo of docker-compose.yml files for each environment.

- Simple commands: most of the time, it’s just "docker-compose pull" and "docker-compose up."

- Our CI pipeline builds images after each commit, runs automated tests, and deploys to staging for QA to run manual tests.

- Very stable: we deploy the same images that were tested in staging. Our deployment success rate and production uptime improved significantly after the switch—even though stability wasn’t a big issue before!

- Common knowledge: everyone on our team is familiar with Docker, and it speeds up onboarding for new hires.