this reply is for @Rodrigo Moya  ( I have to mention it because of serious problem I am facing here in this forum )

thanks a bunch @Rodrigo Moya for guiding and helping us, at least one member on this forum trying to help me.

a) if you're using the dockers container

yes as already mentioned in topic title

sir, I am struggling to create Odoo Docker Containers which I can work on and I can share with other developers by copying the container files, that's why I need all versions separately, is it possible? if yes, I want help from scratch all steps involved (like creating folders for a version and how start working, different things in your previous docker-compose.yml needs to understand like network, ports for db, driver, etc., I want things separately as much as possible within for diff versions containers, database, addons and my custom addons too) because I do not have much knowledge regarding this. as mentioned earlier, I just followed the github link as is to check how it works, now I started realizing  the things a developer can face ( seniors like you... are already well aware ) so, I asked for help.  OR i misunderstood utilizing Docker Container(s) for this purpose? 

I can also struggle to understand and utilize VSCode (as you prefered) but this also needs to configure for all different versions? how to?

also, how i can completely remove a docker container from disk to claim disk space after testing?

hope it is clear now.

with kind regards  

Hi Roshan : Yeah, I look your post on the other one who I also wrote. 

Acording to your questions : 

Q1: where i can found the addons files provided by Odoo?

I don't know if that's what you're looking for, but is the "addons" folder inside odoo instalation. if you're using the dockers container, you can download that folder from the Odoo's github. 

Q2: how I can create addons and custom addons folders separately for each Odoo version?

in odoo.conf, you got the addons_path where you can declare the addons folder. Also, you can declare as many folders as you want for custom addons separated by a comma. For example, when we work with providers, each one of them has a different addons folder. 

Q3: how I can setup Pycharm to access and work with all versions? will this require to install separately for each version?

I don't know if you could do that, and could be hard to manage though. I don't use Pycharm, but if your are using dockers you could use an external folder from the addons, and everytime you need to make a change, simply restart the container. No installation needed. 

Q4: -if it is permissible- how I can start these Odoo Docker Containers all simultaneously or some specific automatically when Ubuntu starts or whenever it required to?

Again, I don't find very right way, but you can install several versions using dockers: The only thing is to use different ports for each version. In my case, I got installed Odoo from 12 to 18 (not running simultaneously), and with different port (Odoo and Postgres). Then, I got using ports 8012, 8013, 8014 and so on until the last odoo version. 

Hope it helps.