How to release

Check if changelog.md is correct
Check if all features are merged in dev and pushed
Pull the latest dev images
```
.build/tag_image.sh dev 1.x.x --save
```
Test if the latest dev build is usable
- Change the the FROM statement in Sakuli Dockerfile to dev tag (in separate branch) and run (after build on dockerhub) docker/.build/tag_image.sh --save

On success - push the tested dev images to dockerhub

.build/tag_image.sh dev 1.x.x
.build/tag_image.sh dev latest

Merge dev branch to master
Create a release on github.com/ConSol/docker-headless-vnc-container/releases/new
Write a blog post for labs.consol.de