Update haproxy config. Enable HTTP/2.

docker/haproxy/config/haproxy.cfg

@@ -61,7 +61,7 @@ listen edges-rpc-in
  server tbEdgesRpc2 tb-core2:7070 check inter 5s resolvers docker_resolver resolve-prefer ipv4
 
 frontend http-in
- bind *:${HTTP_PORT}
+ bind *:${HTTP_PORT} alpn h2,http/1.1
 
  option forwardfor
 
@@ -80,7 +80,7 @@ frontend http-in
  default_backend tb-web-backend
 
 frontend https_in
-  bind *:${HTTPS_PORT} ssl crt /usr/local/etc/haproxy/default.pem crt /usr/local/etc/haproxy/certs.d ciphers ECDHE-RSA-AES256-SHA:RC4-SHA:RC4:HIGH:!MD5:!aNULL:!EDH:!AESGCM
+  bind *:${HTTPS_PORT} ssl crt /usr/local/etc/haproxy/default.pem crt /usr/local/etc/haproxy/certs.d ciphers ECDHE-RSA-AES256-SHA:RC4-SHA:RC4:HIGH:!MD5:!aNULL:!EDH:!AESGCM alpn h2,http/1.1
 
   option forwardfor