Consider Git LFS for large file content

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Large files can become a problem in a repository in many ways. Consider use of large file storage:

• https://github.blog/2015-10-14-managing-large-files-with-git-lfs/
• https://dzone.com/articles/git-lfs-why-and-how-to-use
• https://about.gitlab.com/blog/2017/01/30/getting-started-with-git-lfs-tutorial/