Как грамотно настроить обратное прокси nginx — docker nginx?

server {
        listen 80;
        server_name ex1.example.com;
        return 301 https://$host$request_uri;
}
server {
        listen 443;
        server_name ex1.example.com;
        ssl_certificate           /etc/letsencrypt/live/ex1.example.com/fullchain.pem;
        ssl_certificate_key       /etc/letsencrypt/live/ex1.example.com/privkey.pem;
        ssl on;
        ssl_session_cache  builtin:1000  shared:SSL:10m;
        ssl_protocols  TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4;
        ssl_prefer_server_ciphers on;
        access_log            /var/log/nginx/ex1.access.log;
        location / {
                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;

                proxy_pass          http://ex1.example.loc:8081;
                proxy_read_timeout  90;
        }
}