[REF] Analyze and improve vauxoo/odoo-80-image-shippable-auto docker image

[LuisAlejandro]

Rationale:

Currently the docker image used by Vauxoo's core processes is considerably heavy and has many unnecessary files that can be removed to improve download, test, and overall development times.

Objective:

• Reduce docker image to its minimum weight by removing unnecessary files, git history and dependencies (where possible).

Relevant file:

• Dockerfile

Related issues:

• Improvement of vauxoo/odoo-80-image.
• Improvemant of vauxoo/docker-ubuntu-base

Work in progress:

• PR: To be filled