set credentials in Dockerfile

server/Dockerfile

@@ -38,6 +38,9 @@ ENV NIFI_HOME ${NIFI_BASE_DIR}/nifi-current
 ENV NIFI_TOOLKIT_HOME ${NIFI_BASE_DIR}/nifi-toolkit-current
 ENV NIFI_PID_DIR=${NIFI_HOME}/run
 ENV NIFI_LOG_DIR=${NIFI_HOME}/logs
+# Set GLACIATION credentials username password
+ENV SINGLE_USER_CREDENTIALS_USERNAME=glaciation
+ENV SINGLE_USER_CREDENTIALS_PASSWORD=glaciation
 
 ADD sh/ ${NIFI_BASE_DIR}/scripts/
 RUN chmod -R +x ${NIFI_BASE_DIR}/scripts/*.sh \
@@ -115,5 +118,3 @@ WORKDIR ${NIFI_HOME}
 # https://docs.docker.com/engine/reference/builder/#exec-form-entrypoint-example
 ENTRYPOINT ["../scripts/start.sh"]
 
-# Set GLACIATION credentials username password
-RUN $NIFI_HOME/bin/nifi.sh set-single-user-credentials glaciation glaciation