You can do the same as the command you are already using. For instance:
file1
GGG=/home/ppp
file2
HHH=/ter/ssd
Then run the Docker command:
docker run -it --env-file=/Users/user/file1 --env-file=/Users/users/file2 centos:6.6 /bin/bash
Then once in the container:
[ user@99964c311fef ~]
source share