title: Find and change the value of JAVA_HOME in centos/wildfly docker image
body: <p><strong>I'm just starting out with docker, so this may be a conceptual mistake -</strong> <br>
  <br>
  I downloaded the <a href="https://hub.docker.com/r/centos/wildfly/" rel="nofollow noreferrer">centos/wildfly</a> image from Docker Hub and wanted to change the JDK version of this server.<br>
  However, I couldn't find the JAVA_HOME value anywhere in the wildfly config files, and there isn't any java folder in usr<br>
  For this setup and image, where is it pulling the JDK path from ? Is there a way to access it and hopefully change it ?</p>