Nginx — конфиги под задачу — 4. Reverse proxy на Node.js / Python / Go

upstream app_backend {
    server 127.0.0.1:3000;
    keepalive 32;
}

server {
    listen 80;
    server_name api.local;

    location / {
        proxy_pass http://app_backend;
        proxy_http_version 1.1;
        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_set_header Connection "";
    }
}