server {
    listen 80;
    root /usr/share/nginx/html;

    default_type text/plain;

    location /ipsets/ {
        try_files $uri $uri.txt =404;
    }

    location /lists/ {
        try_files $uri $uri.txt =404;
    }

    location /users/ {
        try_files $uri $uri.txt =404;
    }
}