docs: add image section

[dvilelaf]

Add a section in the README about the open-autonomy-user docker image.

[dvilelaf]

I think the mypy error has to do with this.

It's not architecture dependent, it's only about the specific version of Python you have in your image. If you have Python 3.10.7 you'll see the error, if you have Python 3.10.6 you won't. In all cases, upgrading to mypy 0.981 will fix.

I can reproduce the problem locally when running tox -e mypy.

[Adamantios]

I think the mypy error has to do with this.

It's not architecture dependent, it's only about the specific version of Python you have in your image. If you have Python 3.10.7 you'll see the error, if you have Python 3.10.6 you won't. In all cases, upgrading to mypy 0.981 will fix.

I can reproduce the problem locally when running tox -e mypy.

I suggest that we open an issue to pin a version of mypy without this problem and revert e13ae98.