Pull your desired docker image to your internet connected system:
docker pull image:tag
docker save image:tag -o file.tar
Then transfer file.tar to the air-gapped machine and just do:
docker load -i file.tar
Pull your desired docker image to your internet connected system:
docker pull image:tag
docker save image:tag -o file.tar
Then transfer file.tar to the air-gapped machine and just do:
docker load -i file.tar