healthcheck update

Dockerfile

@@ -38,4 +38,13 @@ RUN yum install -y openssl findutils && yum clean all && mkdir -p "${CONTROL_CEN
    	&& chmod -R ag+w "${CONTROL_CENTER_DATA_DIR}" "${CONTROL_CENTER_CONFIG_DIR}" "/opt"	   
 
 CMD ["/opt/caas/bin/run"]
+
+# Polling period  : 5 seconds
+# Timeout period  :10 seconds (if the polling does not return within this time, treat as a failed poll)
+# Start-up period : 2 minutes (during which failures are not counted as failures)
+# Retry period    : 8 minutes (after which container is deemed unhealthy)
+# All settings can be overriden at run-time in Docker/Docker Compose. 
+HEALTHCHECK --start-period=120s --interval=5s --timeout=10s --retries=96 \
+    CMD curl --fail http://localhost:9021/ || exit 1
+
 USER 1001
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