add alpn_protocols

Author: jose-ledesma

ansible/files/envoy_config/lds.yaml

@@ -432,6 +432,7 @@ resources:
             '@type': >-
               type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.DownstreamTlsContext
             common_tls_context:
+              alpn_protocols: [ "h2,http/1.1" ]
               tls_certificates:
                 - certificate_chain:
                     filename: /etc/envoy/fullChain.pem