postgresql jdbc error

os version:centos7.9 kernel5.4
docker version:20
postgresql version:9.6
dependency-track version:4.2.0

dependency-track-api container is not working.

this is error log:

ERROR [UpgradeMetaProcessor] Unable to load JDBC driver.
java.lang.ClassNotFoundException: 'org.postgresql.Driver'
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:538)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Unknown Source)
................
ERROR [UpgradeInitializer] An error occurred determining database schema version. Unable to continue.
alpine.upgrade.UpgradeException: Unable to load JDBC driver.
at alpine.upgrade.UpgradeMetaProcessor.createConnection(UpgradeMetaProcessor.java:189)
at alpine.upgrade.UpgradeMetaProcessor.(UpgradeMetaProcessor.java:62)
at org.dependencytrack.upgrade.UpgradeInitializer.contextInitialized(UpgradeInitializer.java:53)
at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:1068)
at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:572)
at org.eclipse.jetty.server.handler.ContextHandler.contextInitialized(ContextHandler.java:997)
at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:746)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:379)
at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1449)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1414)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:911)
at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:288)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
at org.eclipse.jetty.server.Server.start(Server.java:423)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
at org.eclipse.jetty.server.Server.doStart(Server.java:387)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
at alpine.embedded.EmbeddedJettyServer.main(EmbeddedJettyServer.java:98)
Caused by: java.lang.ClassNotFoundException: 'org.postgresql.Driver'

use H2 can working but external mod postgresql is not ,please help me