# What is Django?

Django is a free and open source web application framework, written in Python, which follows the model-view-controller architectural pattern. Django's primary goal is to ease the creation of complex, database-driven websites with an emphasis on reusability and "pluggability" of components.

> [wikipedia.org/wiki/Django_(web_framework)](https://en.wikipedia.org/wiki/Django_%28web_framework%29)

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# How to use this image

## Create a `Dockerfile` in your Django app project

```dockerfile
FROM django:onbuild
```

Put this file in the root of your app, next to the `requirements.txt`.

This image includes multiple `ONBUILD` triggers which should cover most applications. The build will `COPY . /usr/src/app`, `RUN pip install`, `EXPOSE 8000`, and set the default command to `python manage.py runserver`.

You can then build and run the Docker image:

```console
$ docker build -t my-django-app .
$ docker run --name some-django-app -d my-django-app
```

You can test it by visiting `http://container-ip:8000` in a browser or, if you need access outside the host, on `http://localhost:8000` with the following command:

```console
$ docker run --name some-django-app -p 8000:8000 -d my-django-app
```

## Without a `Dockerfile`

Of course, if you don't want to take advantage of magical and convenient `ONBUILD` triggers, you can always just use `docker run` directly to avoid having to add a `Dockerfile` to your project.

```console
$ docker run --name some-django-app -v "$PWD":/usr/src/app -w /usr/src/app -p 8000:8000 -d django bash -c "pip install -r requirements.txt && python manage.py runserver 0.0.0.0:8000"
```

## Bootstrap a new Django Application

If you want to generate the scaffolding for a new Django project, you can do the following:

```console
$ docker run -it --rm --user "$(id -u):$(id -g)" -v "$PWD":/usr/src/app -w /usr/src/app django django-admin.py startproject mysite
```

This will create a sub-directory named `mysite` inside your current directory.