You're using a JAVA application, right? [
Did you locate a PHP application at
/opt/bitnami/apps/phpmyadmin/htdocs? Please do not place anything there since that's the directory used for PhpMyAdmin files which allows you to easily manage the MySQL database through the website.
Please find out the documentation below:
You'll find all the docs about where to place your JAVA app and how to manage Tomcat.