server {
    listen 80;
    server_name _;
    client_max_body_size 10m;
    location ~ /\. { deny all; }
    location / {
        proxy_pass http://app:80;
        proxy_set_header Host $http_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;
    }
}