Update Dockerfile for ubuntu image. Avoid `apt-get upgrade -y`.
What does this MR do?
Modify the Dockerfile for building the Ubuntu image.
Removed the apt-get upgrade line, as it is not encouraged in a Dockerfile, as suggested by Docker itself.
Here is the relevant part:
Avoid RUN apt-get upgrade and dist-upgrade, as many of the “essential” packages from the parent images cannot upgrade inside an unprivileged container. If a package contained in the parent image is out-of-date, contact its maintainers. If you know there is a particular package, foo, that needs to be updated, use apt-get install -y foo to update automatically.
Why was this MR needed?
I think the modification I made follows the best practices suggested by Docker.
Are there points in the code the reviewer needs to double check?
Does this MR meet the acceptance criteria?
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Documentation created/updated -
Added tests for this feature/bug -
In case of conflicts with master- branch was rebased