Metabase welcome page for “as a service”

Debian GNU/Linux
Bitnami LAMP stack + Metabase jar

How is the following code applied? Is it a stand-alone file or must it replace something in an existing configuration file?

server {
listen 80;
listen [::]:80;
location / {

The most relevant file appears to be this 500+ line file:

Guide followed:

@mesquest The configuration snippet is for Nginx. You are using Apache.
You would have to follow an Apache tutorial, example this: