Enforce line-feed/new-line character as the only EOL for certain line-ending sensitive script files.

[kaladay]

This problem happens when starting a Docker container that attempts to run these files. The line-endings could end up with carriage-return characters and the scripts may fail to execute.

References:

• https://git-scm.com/docs/git-config#Documentation/git-config.txt-coreattributesFile
• https://git-scm.com/docs/gitattributes
• https://docs.github.com/en/get-started/getting-started-with-git/configuring-git-to-handle-line-endings