Compose day to day

The five commands you actually use

docker compose up -d          # create/start everything in the background
docker compose ps             # status of this project's services
docker compose logs -f app    # follow one service's logs
docker compose up -d --build  # rebuild images that changed, then restart
docker compose down           # stop and remove containers + network

Notes that save you pain:

• up is idempotent: run it again and compose only recreates services whose config or image changed
• After editing your code you need --build, otherwise compose happily reuses the stale image from lesson 3-1's last build
• down keeps named volumes by default, so your database from lesson 4-1 survives. down -v deletes volumes too, which is the reset-everything button. Say it out loud before pressing it