set password in launch.sh script, to setup the zeppelin password for admin, user1, user2, user3 Zeppelin will be launched without root privileges, to prevent any root access to the container from the notebook. you can customise the root password by adding the SHA-256 hash to the build file.
openssl passwd -6 -salt XYZ password
docker build . -t jemaiah/zeppelin-docker:0.8.2