webserver443

server {
    listen 443 ssl;
    server_name $DOMAIN;

    ssl_certificate /etc/letsencrypt/live/$DOMAIN/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/$DOMAIN/privkey.pem;

    location / {
        set $upstream "site_upstream";

        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_set_header X-Real-Port $server_port;
        proxy_set_header X-Real-Scheme $scheme;
        proxy_set_header X-NginX-Proxy true;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Ssl on;

        expires off;

        proxy_pass http://$upstream;
    }
}

upstream site_upstream{
    server $APP_INTERNAL_URL;
}