run your app on a high port 8080 or whatev then
sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
If you are not using ngnix or apache
run your app on a high port 8080 or whatev then
sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
If you are not using ngnix or apache