Online tool to check server HTTP/2, ALPN, and Server-push support.

HTTP/2 supported!

Fantastic! This server supports HTTP/2.

ALPN: ALPN Supported
This server supports Application-Level Protocol Negotiation. ALPN is a TLS extension that helps client and server negotiate the HTTP protocol (h2 in this case) during the TLS handshake. This avoids the need to make a regular HTTP/1.1 request in order to establish an h2 connection.
PUSH: Using (Link header)
This server appears to make use of HTTP/2 push. Awesome!