# /etc/nginx/sites-available/fv-purchase  — replace fv.example.com with your sub-domain
server {
    listen 80;
    server_name fv.example.com;
    location /.well-known/acme-challenge/ { root /var/www/html; }
    location / { return 301 https://$host$request_uri; }
}
server {
    listen 443 ssl http2;
    server_name fv.example.com;
    ssl_certificate     /etc/letsencrypt/live/fv.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/fv.example.com/privkey.pem;
    client_max_body_size 5m;
    location / {
        proxy_pass http://127.0.0.1:3100;
        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;
    }
}