[11.0-13.0] Odoo nightly version

[anassahmed]

Hello,

Lately I've noticed that you update this repository on arbitrary times (nightly versions). But from what I've gathered that nightlies of the first day of each month is kept after a year has passed.

So, I think you should only build for 01-xx-20xx packages, and not any other day. I've projects that depend on the odoo nightly being available and when I build the same Dockerfile again a year later, I find it disappeared.