add image-tagging policy doc

Signed-off-by: Steve Kriss <steve@heptio.com>
pull/479/head
Steve Kriss 2018-05-08 16:06:46 -07:00
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# Image tagging policy
This document describes Ark's image tagging policy.
## Released versions
`gcr.io/heptio-images/ark:<SemVer>`
Ark follows the [Semantic Versioning](http://semver.org/) standard for releases. Each tag in the `github.com/heptio/ark` repository has a matching image, e.g. `gcr.io/heptio-images/ark:v0.8.0`.
### Latest
`gcr.io/heptio-images/ark:latest`
The `latest` tag follows the most recently released version of Ark.
## Development
`gcr.io/heptio-images/ark:master`
The `master` tag follows the latest commit to land on the `master` branch.