message: use /bin/sh as default shell for user
diff: if ! whoami &> /dev/null; then
  if [ -w /etc/passwd ]; then
  - echo "${USER_NAME:-user}:x:$(id -u):0:${USER_NAME:-user}:${HOME}:/usr/bin/bash" >> /etc/passwd
  + echo "${USER_NAME:-user}:x:$(id -u):0:${USER_NAME:-user}:${HOME}:/bin/sh" >> /etc/passwd
  fi
  fi
  \ No newline at end of file
  