Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <welcome-file-list>
    <welcome-file>/index.html</welcome-file>
  </welcome-file-list>
  
  <!-- -->
   
   <servlet>
        <servlet-name>prometheusMetrics</servlet-name>
        <servlet-class>io.prometheus.client.exporter.MetricsServlet</servlet-class>      
</servlet>
<servlet-mapping>
        <servlet-name>prometheusMetrics</servlet-name>
        <url-pattern>/prometheusMetrics/*</url-pattern>
</servlet-mapping>

   
</web-app>