COMP: CMake 3.19 has problems with ITK, set version to 3.18 in Dockerfile
COMP: CMake 3.19 has problems with ITK, set version to 3.18 in Dockerfile

stnava/ANTs,stnava/ANTs,stnava/ANTs,stnava/ANTs,stnava/ANTs,stnava/ANTs,stnava/ANTs