Also I forget to mention that I added SSL protocols into /etc/nginx/nginx.conf.
```
ssl_protocols TLSv1.1 TLSv1.2 TLSv1.3;
ssl_prefer_server_ciphers on;
```

To avoid any confusions - I'm getting http2 response when using http2 in listen stanza.
I'm getting http/1.1 if there isn't http2 defined.