bug(#22607) Add Directory.Packages.props and update restore command

[lucky5th]

Updated Dockerfile to include Directory.Packages.props and modified restore command to resolve docker build errors during dotnet restore step. Resolves issue #22607

[github-actions]

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[AndyButland]

Thanks for catching and fixing this @lucky5th. It looks like this file was missed in the update to add support for central package management in #2164.

However, CPM isn't required, it's an option, and now the default option, but it's possible to also have "per project" package references like we had as the only option up to and including 17.2. See the -pm / --package-management option documented here.

Given this is a template, I think you will need to apply a similar <!--#if (UseCPM) --> ... <!--#endif --> and <!--#if (!UseCPM) --> ... <!--#endif --> as you see here for the .csproj file.

That way you can render the appropriate lines depending on which option was selected.

Would you be up for making and testing out that change? Otherwise, if you prefer, we can pick it up from here.

[nikolajlauridsen]

Hey @lucky5th, thanks a lot for the fix. I think you're on the right track and would like to get this cherry-picked into the 17.4 release, so the Docker template works again, so I've taken the liberty of adding the change for you.

I added a condition around the copy statement and left the update to the restore line, since this is fine in both cases. I'll go ahead and test this locally, and then I'll get it merged 👍

[nikolajlauridsen]

Just tested this locally with artefacts from the build server, and it all works well, with and without central package management. Thank you for your contribution @lucky5th, I'll cherry-pick this for 17.4

[lucky5th]

@nikolajlauridsen @AndyButland I’m happy to help.