Revert "Delete .gitignore"

This reverts commit 2ba511fe74cfb1eab46c81852d882a4930506cd7.
Revert "Revert "Delete .gitignore""

This reverts commit c23717a41480431de046d8470c7a9a5f4a663135.
Revert "Delete .gitignore"

This reverts commit 2ba511fe74cfb1eab46c81852d882a4930506cd7.