Question about setting up port for HTTP server

Hello, I was able to port forward for a TCP socket server I am running on a droplet, however I cannot seem to do the same for my HTTP server. I used the following commands to allow access to my TCP server:

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 37842 -j DNAT --to-destination 10.124.0.2:37842 iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

This allowed access for tcp connections on the port 37842 and I was able to connect to it. However, when I try to set up an HTTP server on port 8000, I get Not Found (404) errors. I try to access the HTTP server with http://<public-ip>:8000/ but am unsuccessful. I have tried different ways of using iptables to forward the port and get access to my application, but nothing seems to reach it. I am asking how to modify my iptables commands to allow access to my http server from the public ip address when it is hosting off of http://10.124.0.2:8000/ ?

Thanks