server {
    listen 443 ssl http2;
    server_name app.example.org;
    server_tokens off;

    # ssl_certificate /...;
    # ssl_certificate_key /...;

    location / {
        proxy_pass http://127.0.0.1:8080;
        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 https;
    }
}