This repository serves Dockerized Singularity, organized by versions that are currently installed from the Singularity main repository (based on versioned branches).
See the master branch for a complete list of versions, and the singularity/singularity container on Quay.io. Older versions can be found in the singularityware/singularity repository on Docker Hub.
Currently, the intended use case is to provide these as base images for continuous integration, meaning that you should be able to build a container using one of these environments.