nginx.conf

worker_processes 1;

events {
    worker_connections 1024;
}

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

    upstream user_api {
        server 127.0.0.1:3001;
    }

    upstream order_api {
        server 127.0.0.1:3002;
    }

    upstream product_api {
        server 127.0.0.1:3003;
    }

    server {
        listen 8081;
        server_name localhost;

        location /api/product {
            proxy_pass http://product_api;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        location /api/user {
            proxy_pass http://user_api;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        location /api/order {
            proxy_pass http://order_api;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

    }
}