Fix typo in Dockerfile (FROM instruction uppercase)
Fix typo in Dockerfile (FROM instruction uppercase)

Rombur/DataTransferKit,dalg24/DataTransferKit,Rombur/DataTransferKit,Rombur/DataTransferKit,ORNL-CEES/DataTransferKit,dalg24/DataTransferKit,ORNL-CEES/DataTransferKit,ORNL-CEES/DataTransferKit,dalg24/DataTransferKit,dalg24/DataTransferKit,ORNL-CEES/DataTransferKit,Rombur/DataTransferKit