[Python] How to add NGINX to a Python app on Heroku?

I am trying to get nginx working on my flask app with hosting on heroku. My app is using flask-socketio. I'm getting this error app[web.1]: nginx: [emerg] bind() to 0.0.0.0:27318 failed (98: Address already in use). I tried using a single '&' in the Procfile and it loops this error in the console app[web.1]: buildpack=nginx at=app-initialization

Here are my files.

nginx.conf

worker_processes 1;

events {
worker_connections 1024;
}

http {
include mime.types;
sendfile on;

server_tokens off; # Hide Nginx version
more_set_headers "Server: Secure"; # Override server header

upstream flask_backend {
server 127.0.0.1:5000; # Ensure Gunicorn is running on this port
}

server {
listen 8080;

location / {
proxy_pass http://flask_backend;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;

proxy_hide_header X-Powered-By;
proxy_hide_header Server;
more_clear_headers 'X-Powered-By' 'Server';

proxy_buffering off;
proxy_cache_bypass $http_upgrade;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
}
}


}

Procfile

web: bin/start-nginx && gunicorn -c config/gunicorn.conf.py -k
eventlet -w 1 app:app --bind 0.0.0.0:$PORT


app.py

if __name__ == '__main__':
port = int(os.environ.get('PORT', 5000)) # Use Heroku-assigned port
socketio.run(app, host="0.0.0.0", port=port)


gunicorn.conf.py

import os
import multiprocessing

bind = "unix:/tmp/nginx.socket"
workers = multiprocessing.cpu_count() * 2 + 1

def on_starting(server):
open("/tmp/app-initialized", "w").close()


Is there a way around this?

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