Add user as random number (#16600)

Author: valenad1

docker/public/Dockerfile-h2o-release

@@ -40,3 +40,5 @@ COPY LICENSE /licenses/
 # By default, run H2O and allocate only 50 percent of memory available to the JVM, the rest remains free for XGBoost
 # Overridable by the user
 CMD java -Djava.library.path=/opt/h2oai/h2o-3/xgb_lib_dir -XX:+UseContainerSupport -XX:MaxRAMPercentage=50 -jar /opt/h2oai/h2o-3/h2o.jar
+
+USER 852