server {
    listen 80;
    server_name _;

    # When another proxy sits in front (CI, tunnel), honour its client IP.
    set_real_ip_from 10.0.0.0/8;
    set_real_ip_from 172.16.0.0/12;
    set_real_ip_from 192.168.0.0/16;
    set_real_ip_from 127.0.0.0/8;
    set_real_ip_from fc00::/7;
    real_ip_header X-Forwarded-For;
    real_ip_recursive on;

    client_max_body_size 64m;

    location / {
        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 X-Forwarded-Host $host;
        proxy_pass http://app:8000;
    }
}