Update Dockerfile

[jt0dd]

Description

Solves #2515 and #2579

Fixes an error where a Windows user somehow modifies update-agents.sh (this can happen indirectly, because I was having this error without modifying the file) resulting in Windows line endings breaking Linux interpretation of the file.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

I've tested it on my Windows 11 machine, launching the Docker version of the project.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

I'm not sure how to create a unit test for a Dockerfile

[jt0dd]

I don't think this can hurt, especially since it's tied to the WIN_BUILD argument.

[github-actions]

This issue is stale because it has been open 20 days with no activity. Remove stale label or comment or this will be closed in 5 days

[clenk]

The changes look good to me.
The tests are passing but workflows are failing because the fork doesn't have our SonarCloud token.

[elegantmoose]

Thank you for your contribution @jt0dd