Script to generate Singularity recipe from Dockerfile

[prehensilecode]

Adding a bash script to generate a Singularity recipe from the Dockerfile.

Tested using:

• RHEL 8
• Python 3.9.1
• Singularity Python (spython) 0.1.15
• Singularity 3.8.0-1.el8 (via EPEL)

[Augustin-Zidek]

Unfortunately we don't have the capacity to maintain and support Singularity. We added a link in the README to the two AlphaFold issues that have links to third party repositories with Singularity definition files (#10 and #24).

[prehensilecode]

Unfortunately we don't have the capacity to maintain and support Singularity. We added a link in the README to the two AlphaFold issues that have links to third party repositories with Singularity definition files (#10 and #24).

Thank you. I have split off my changes into a separate repository containing only the Singularity-related files: https://github.com/prehensilecode/alphafold_singularity