Fix permissions when host mounting SSL cert/key
Fix permissions when host mounting SSL cert/key

Copied from b7353bf on jupyter/docker-stacks

dalg24/Cap,Rombur/Cap,Rombur/Cap,dalg24/Cap,ORNL-CEES/Cap,ORNL-CEES/Cap,Rombur/Cap,ORNL-CEES/Cap,dalg24/Cap