seafile-containerized/MAINT.md

## For Project Maintainer: How to update seafile-docker when a new version is released

Imagine the previous version is 6.0.5 and we have released 6.0.7. Here are the steps to do the upgrade.

* Switch to a branch "unstable"
```sh
git branch -f unstable origin/master
git checkout unstable
```
* Update the version number in all the files/scripts from "6.0.5" to "6.0.7" and push it to github, then wait for travis ci (https://travis-ci.org/haiwen/seafile-docker/builds) to pass
```sh
git push origin unstable:unstable
```
* Create a tag "v6.0.7" and push it to github. Wait for travis ci to finish: this time it would push the image seafileltd/seafile:6.0.7 to docker hub since it's triggered by a tag.
```sh
git tag v6.0.7
git push origin v6.0.7
```
* Ensure the new image is available in https://hub.docker.com/r/seafileltd/seafile/tags/
* Now update the master branch.
```
git push origin unstable:master
```
* Delete the unstable branch
```sh
git push origin :unstable
```