How do I go about uploading a site to a port on the IP?

I have a Laravel API I want to upload to a DigitalOcean droplet. I want to upload it on to a port on the IP. I am not sure if I am using the correct jargon when I say “port on the IP”

Basically, I want my API to connect when I type in xxx.xxx.xxx.xxx:port where port is the port number.

I have made a .conf file in /etc/apache2/sites-available. The code is below:

Listen xxx.xxx.xxxx.xxx:8037
	<VirtualHost xxx.xxx.xxxx.xxx:8037>
	ServerName www.servername.com
	DocumentRoot "/var/www/html/hotelguide/public"
	<Directory /var/www/html/hotelguide/public>
		AllowOverride All
		Order allow,deny
		Require all granted
		Allow from all
	</Directory>
	</VirtualHost>

I used 8037 as a random port as some were already in use (its not my droplet, its a droplet I share with other people)

I have not changed any other file, nor added any other file either

Thank you