commit a4476d3a46e2b865b0372f752a65ca212fce5b67
Author: Jan Dankert 
Date:   Tue Nov 19 20:39:45 2019 +0100

    Fix permissions for preview folder; Added docker documentation.

 Dockerfile | 16 ++++++++++++----
 README.md  | 40 ++++++++++++++++++++++++++++++++--------
 2 files changed, 44 insertions(+), 12 deletions(-)