[ADD] docker file and shippable compatibility

Docker odoo image
Building here
[ocaimages/oca-odoo](https://registry.hub.docker.com/u/ocaimages/oca-odoo/builds_history/91750/)
I used your stable code
https://github.com/Vauxoo/maintainer-quality-tools/blob/master/travis/travis_install_nightly#L4