server.xml

<server description="defaultServer">

	<!-- Enable features -->
	<featureManager>
		<feature>javaee-8.0</feature>
		<feature>sessionDatabase-1.0</feature>
	</featureManager>

	<!-- This template enables security. To get the full use of all the capabilities, 
		a keystore and user registry are required. -->

	<!-- For the keystore, default keys are generated and stored in a keystore. 
		To provide the keystore password, generate an encoded password using bin/securityUtility 
		encode and add it below in the password attribute of the keyStore element. 
		Then uncomment the keyStore element. -->
	<!-- <keyStore password=""/> -->

	<!--For a user registry configuration, configure your user registry. For 
		example, configure a basic user registry using the basicRegistry element. 
		Specify your own user name below in the name attribute of the user element. 
		For the password, generate an encoded password using bin/securityUtility 
		encode and add it in the password attribute of the user element. Then uncomment 
		the user element. -->
	<basicRegistry id="basic" realm="BasicRealm">
		<user name="admin" password="admin123" />
	</basicRegistry>

	<keyStore id="defaultKeyStore" password="admin123" />

	<!-- To access this server from a remote client add a host attribute to 
		the following element, e.g. host="*" -->
	<httpEndpoint host="*" httpPort="9080" httpsPort="9443"
		id="defaultHttpEndpoint" />

	<httpSessionDatabase id="SessionDB"
		dataSourceRef="JavaEECafeDB" />

	<httpSession storageRef="SessionDB" />

	<!-- Automatically expand WAR files and EAR files -->
	<applicationManager autoExpand="true" />

	<dataSource id="JavaEECafeDB"
		jdbcDriverRef="postgresql-driver" jndiName="jdbc/JavaEECafeDB"
		transactional="true" type="javax.sql.ConnectionPoolDataSource">
		<properties databaseName="postgres"
			password="${env.POSTGRES_PASSWORD}" portNumber="5432"
			serverName="postgres" user="${env.POSTGRES_USER}" />
	</dataSource>

	<jdbcDriver id="postgresql-driver"
		javax.sql.ConnectionPoolDataSource="org.postgresql.ds.PGConnectionPoolDataSource"
		javax.sql.XADataSource="org.postgresql.xa.PGXADataSource"
		libraryRef="postgresql-library" />

	<library id="postgresql-library">
		<fileset dir="${shared.resource.dir}" id="PostgreSQLFileset"
			includes="postgresql-42.2.4.jar" />
	</library>
</server>