message: remove duplicate USER.
diff: @@ -92,8 +92,6 @@ COPY root/usr/share/container-scripts/mysql/galera.cnf /usr/share/container-scri
  COPY root/usr/share/container-scripts/mysql/configure-galera.sh /usr/share/container-scripts/mysql/configure-galera.sh
  COPY root/etc/mysql/conf.d/galera.cnf /etc/mysql/conf.d/galera.cnf
  -USER mysql
  -
  ### we cannot start mysql as root, we add the user mysql to the group root and change the user of the Docker Image to this user
  USER mysql
  