Update Dockerfile
Update Dockerfile

Update boost to 1.63.0, deal.II to 8.5.1, and Trilinos to 12.10.1. Install
pandoc from apt instead of pip due to a bug with Jupyterhub (cannot find pandoc
installed by pip).

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