FreeCAD docker and singularity images
https://github.com/FreeCAD https://www.freecadweb.org/wiki/CompileOnUnix#Ubuntu
Get Latest singularity image
wget https://eicweb.phy.anl.gov/containers/freecad_image/-/jobs/artifacts/master/raw/build/Singularity.freecad.simg?job=freecad_image_singularity -O Singularity.freecad.simg
or use modules
module load freecad_image