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# Docker Documentation
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The source for Docker documentation is here under `sources/` and uses extended
Markdown, as implemented by [MkDocs](http://mkdocs.org).
The HTML files are built and hosted on `https://docs.docker.io`, and update
automatically after each change to the master or release branch of [Docker on
GitHub](https://github.com/dotcloud/docker) thanks to post-commit hooks. The
`docs` branch maps to the "latest" documentation and the `master` (unreleased
development) branch maps to the "master" documentation.
## Branches
**There are two branches related to editing docs**: `master` and a `docs`
branch. You should always edit documentation on a local branch of the `master`
branch, and send a PR against `master`.
That way your fixes will automatically get included in later releases, and docs
maintainers can easily cherry-pick your changes into the `docs` release branch.
In the rare case where your change is not forward-compatible, you may need to
base your changes on the `docs` branch.
Also, now that we have a `docs` branch, we can keep the
[http://docs.docker.io](http://docs.docker.io) docs up to date with any bugs
found between Docker code releases.
**Warning**: When *reading* the docs, the
[http://beta-docs.docker.io](http://beta-docs.docker.io) documentation may
include features not yet part of any official Docker release. The `beta-docs`
site should be used only for understanding bleeding-edge development and
`docs.docker.io` (which points to the `docs` branch`) should be used for the
latest official release.
## Contributing
- Follow the contribution guidelines ([see
`../CONTRIBUTING.md`](../CONTRIBUTING.md)).
- [Remember to sign your work!](../CONTRIBUTING.md#sign-your-work)
## Getting Started
Docker documentation builds are done in a Docker container, which installs all
the required tools, adds the local `docs/` directory and builds the HTML docs.
It then starts a HTTP server on port 8000 so that you can connect and see your
changes.
In the root of the `docker` source directory:
make docs
If you have any issues you need to debug, you can use `make docs-shell` and then
run `mkdocs serve`
## Style guide
The documentation is written with paragraphs wrapped at 80 column lines to make
it easier for terminal use.
### Examples
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When writing examples, give the user hints by making them resemble what they see
in their shell:
- Indent shell examples by 4 spaces so they get rendered as code.
- Start typed commands with `$ ` (dollar space), so that they are easily
differentiated from program output.
- Program output has no prefix.
- Comments begin with `# ` (hash space).
- In-container shell commands begin with `$$ ` (dollar dollar space).
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### Images
When you need to add images, try to make them as small as possible (e.g. as
gifs). Usually images should go in the same directory as the `.md` file which
references them, or in a subdirectory if one already exists.
## Working using GitHub's file editor
Alternatively, for small changes and typos you might want to use GitHub's built-
in file editor. It allows you to preview your changes right on-line (though
there can be some differences between GitHub Markdown and [MkDocs
Markdown](http://www.mkdocs.org/user-guide/writing-your-docs/)). Just be
careful not to create many commits. And you must still [sign your
work!](../CONTRIBUTING.md#sign-your-work)
## Publishing Documentation
To publish a copy of the documentation you need a `docs/awsconfig`
file containing AWS settings to deploy to. The release script will
create an s3 if needed, and will then push the files to it.
[profile dowideit-docs] aws_access_key_id = IHOIUAHSIDH234rwf....
aws_secret_access_key = OIUYSADJHLKUHQWIUHE...... region = ap-southeast-2
The `profile` name must be the same as the name of the bucket you are deploying
to - which you call from the `docker` directory:
make AWS_S3_BUCKET=dowideit-docs docs-release