Update Docker version of SUMMA

[ijaguirre]

Hi,

I would like to suggest updating the Docker version of SUMMA (https://hub.docker.com/r/bartnijssen/summa/) described in https://summa.readthedocs.io/en/latest/installation/SUMMA_docker/, with a new version that incorporates the recent changes in SUMMA.

In this context, it would be great to provide instructions on creating the Docker files in https://github.com/CH-Earth/summa/tree/master/utils to streamline the process of making these Docker versions.