And stop trying to find version of odoo, it will either not work (like in most cases),
or it will be listed in the pip freeze listing

The Odoo 10 base image now merges addons, same as the Odoo 11 one.

also changed tabs to spaces

start: add path for addons directory that can be different from odoo bin path. try to give it a reasonable value, it is the one from that work in our docker, but it can be changed with an environment variable