Update README

README.md

@@ -4,10 +4,20 @@ Gmsh files for caridac geometries
 
 Source code : https://github.com/ComputationalPhysiology/cardiac-geometries-core
 
+
 ## Install
+You can install the package with pip
 ```
 python3 -m pip install cardiac-geometries-core
 ```
+or you can just run a container without any installation, i.e
+```
+docker run --rm -w /home/shared -v $PWD:/home/shared -it ghcr.io/computationalphysiology/cardiac-geometries-core:latest
+```
+For example the following command will create an lv ellipsoid and save it to a file called `lv-mesh.msh`
+```
+docker run --rm -w /home/shared -v $PWD:/home/shared -it ghcr.io/computationalphysiology/cardiac-geometries-core:latest lv-ellipsoid lv-mesh.msh
+```
 
 ## Authors
 Henrik Finsberg (henriknf@simula.no)