Build base images (needed by all later builds):
cd docker_gchp
docker build -t spack_base ./spack_base
docker build -t spack_gcc_mpi ./spack_gcc_mpi
Compile GCHP (each can be built independently):
docker build -t gchp_12.3.2_openmpi ./gchp_12.3.2_openmpi
docker build -t gchp_12.5.0_openmpi ./gchp_12.5.0_openmpi