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编写 Django Dockerfile

为您的应用构建精简的分层镜像

编写 Django Dockerfile 是 CoddyKit 上的免费 Django Academy 课时。这是第 1 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Django Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Django Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Why a Dockerfile

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

Pick a Base Image

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

FROM python:3.12-slim

Set the Work Directory

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

WORKDIR /app

Tame Python Output

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

ENV PYTHONUNBUFFERED=1 PYTHONDONTWRITEBYTECODE=1

Copy Requirements First

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

COPY requirements.txt .

Install Dependencies

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

RUN pip install --no-cache-dir -r requirements.txt

Copy Your Project

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

COPY . .

Expose the Port

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

EXPOSE 8000

Define the Start Command

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

CMD ["gunicorn", "config.wsgi:application", "--bind", "0.0.0.0:8000"]

Add a .dockerignore

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

.git
__pycache__
.venv
*.sqlite3

Build Your Image

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

docker build -t myapp:latest .

Quick Check

Think about Docker's layer cache and build order.

Recap

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

常见问题解答

「编写 Django Dockerfile」课时是免费的吗？

是的 — 「编写 Django Dockerfile」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Django Academy 课程的其余内容，请升级到 CoddyKit PRO。 Django Academy 课程共包含 4 节课。

「编写 Django Dockerfile」这节课中我会学到什么？

为您的应用构建精简的分层镜像你通过在浏览器中直接运行的动手代码来练习 Django Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Django Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Django Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 1 节课，共 4 节。

「编写 Django Dockerfile」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Django Academy 课中编写并运行代码吗？

能。每节 Django Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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