drone/drone — pull request #589 by dangra (2014-10-17 12:29:35+00:00)
Title: Quicker and less verbose docker installation for publish step

Fetch the docker binary as described in https://docs.docker.com/installation/binaries/

this has some advantages:
- It's quicker
- Less verbose (no apt key/update/install output in logs)
- It works for images not based on debian/ubuntu
- No need to install dependencies used only for server part when we only want client functionality.