[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/)
You can add ```-y --force-yes``` in each apt-get install
But We don't have control in other .travis.yml without this parameter.
And we can't change all .travis.yml just to remove
```
echo 'APT::Get::Assume-Yes "true";' >> /etc/apt/apt.conf \
    && echo 'APT::Get::force-yes "true";' >> /etc/apt/apt.conf
```
FYI travis ci use this configuration too