Nginx config to serve proxy protocol v2

nginx.conf

user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
        worker_connections 768;
        # multi_accept on;
}


http {
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
    upstream backend {
        server 127.0.0.1:9000;
    }
    server {
        listen 80   proxy_protocol;
        location / {
            proxy_pass http://backend;
            proxy_set_header Proxy-Protocol $proxy_protocol_addr;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_protocol_addr;
        }
        sendfile on;
        tcp_nopush on;
        types_hash_max_size 2048;
        include /etc/nginx/mime.types;
        default_type application/octet-stream;
        access_log /var/log/nginx/access.log;
        error_log /var/log/nginx/error.log;
    }
}