use ChatGPT's recommendation for inserting the build time.

Author: jbfaden

HapiServer/build.xml

@@ -68,4 +68,19 @@
     nbproject/build-impl.xml file. 
 
     -->
+    <target name="-pre-dist">
+        <tstamp>
+            <format property="war.build.time"
+                    pattern="yyyy-MM-dd'T'HH:mm:ss'Z'"
+                    timezone="UTC"/>
+        </tstamp>
+
+        <mkdir dir="${build.web.dir}/WEB-INF/classes"/>
+
+        <propertyfile
+            file="${build.web.dir}/WEB-INF/classes/build.properties">
+            <entry key="build.time"
+                   value="${war.build.time}"/>
+        </propertyfile>
+    </target>
 </project>