What is a Dockerfile, and how do you write one?
A Dockerfile is the recipe Docker builds an image from. Write one for a Python web app with cached layers, a non-root user, a healthcheck and two stages.
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Restart or rebuild a Docker Compose service
Restart, up -d, rebuild or pull: which Docker Compose command picks up an edited compose file, a new .env, a changed Dockerfile or a new image.