Singularity allows you to use a 'definition file' so you can reproduce the resulting container configurations on demand. Let's say you want to create a container with Ubuntu with Anaconda. First, we need our definition file. Here's an example Anaconda definition file:
Singularity.anaconda3-py39-2021.11-ubuntu-20.04
The following command creates an ubuntu-anaconda.sif image from the
definition file Singularity.anaconda3-py39-2021.11-ubuntu-20.04:
mkdir naked-singularity
cd naked-singularity
sudo singularity build ubuntu-anaconda.sif definition-files/anaconda/Singularity.anaconda3-py39-2021.11-ubuntu-20.04
This may take a while to complete.