Increase --shm-size for docker run on GPU

[michelle-yooh]

• --shm-size is increased to 1g for docker run on GPU because the default value of 64mb might not be sufficient for other set of GPUs (e.g. A100-40gb-8)
• --shm-size=1g is added to the docker run command shown at the end of docker_build_dependency_image.sh, to give good guidance to users
• README is updated accordingly