fix README

README.md

 # Numerical experiments for LDD-TPR
-## Manual on using latest fenix image in Docker
+
+## Manual how to set up latest fenix image in Docker
 Pull the latest fenics Docker image
 ```
 	docker pull quay.io/fenicsproject/stable:latest;
 
+
 ## Create docker container named LDD-TPR with graphical display, share folder `pwd`:
 
   docker run --dns=129.69.252.252 -it --env HOST_UID=$(id -u $USER) --env HOST_GID=$(id -g $USER) --env DISPLAY=unix$DISPLAY --device /dev/dri --volume /tmp/.X11-unix:/tmp/.X11-unix:rw --volume $(pwd):/home/fenics/shared --name LDD-TPR quay.io/fenicsproject/stable:latest /bin/bash 
 
+
 If you want the container do be automatically deleted after exiting add `--rm` option.
 
 
@@ -27,18 +30,22 @@ List all docker container
 
   docker ps -a
 
+
 Remove container
 
   docker rm $container
 
+
 Remove all stopped container
 
   docker container prune
 
+
 List all images
 
     docker images
 
+
 Remove image
 
     docker rmi $image