Écrire un Dockerfile Django

A Dockerfile is a recipe that builds your app into a portable image, so it runs the same on your laptop and any server. 🐳

Start every Dockerfile with FROM, choosing a slim Python base so your image stays small and fast to ship.

Use WORKDIR to set the folder where your code lives, so later commands run from a clean, predictable place.

Two ENV flags help in containers: unbuffered logs and no .pyc files, keeping output instant and images tidy.

Copy requirements.txt before your code. Docker caches this layer, so installs are skipped when only your code changes.

Run pip install with --no-cache-dir so the package cache never bloats your final image.

Now COPY the rest of your project in. Doing this after the install keeps the cached dependency layer reusable.

Use EXPOSE to document the port your app listens on. It is a hint to readers and tools, not a firewall.

End with CMD, the default command that launches your app when the container starts.

A .dockerignore keeps junk like venvs and .git out of the build context, making builds faster and images leaner.

Run docker build with a tag to turn your Dockerfile into a reusable, named image you can run anywhere.

Think about Docker's layer cache and build order.

You built a Django Dockerfile: pick a slim base, set env, install deps before code for caching, then define CMD. One recipe, runs anywhere. 🎉