Fix css build issue.
Adding SFTP deploy task.
Revert "Adding SFTP deploy task."

This reverts commit c26fd0fb0b0a34a13e320dbda6fa6857d9476f08.
Revert "Revert "Adding SFTP deploy task.""

This reverts commit c80e0fd2324fef97952b902e5943a10d0e4c2a50.
Forgot to add an ftppass.json file in previous commit.
Refactoring the way the spreadsheet config is used.