nginx X-Forwarded-For and X-Real-IP

compose.yml

version: '3.9'

services:
  nginx:
    image: nginx:1.25.3-alpine
    depends_on:
      - api
    ports:
      - 3000:80
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf:ro

  api:
    build: . 

nginx.conf

user nginx;
worker_processes 1;

events {
  worker_connections 1024;
}

http {
  include       /etc/nginx/mime.types;
  default_type  application/octet-stream;

  sendfile           on;
  keepalive_timeout  65;

  server {
    listen       80;
    server_name  localhost;

    set_real_ip_from   192.168.65.0/24;
    real_ip_header     X-Forwarded-For;
    real_ip_recursive  on;

    location / {
      proxy_pass http://api:3000;
      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;
    }
  }
}