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Cannot create new gRPC project on macOS

See original GitHub issue

I’m unable to run a new gRPC server project on macOS Mojave (10.14.5). I get that ALPN isn’t supported in macOS but is there something that can be added to the template to help with the developer experience in the templates or via documentation?

Steps

dotnet new grpc dotnet new run

Results

warn: Microsoft.AspNetCore.Server.Kestrel[0]
      Unable to bind to https://localhost:5001 on the IPv4 loopback interface: 'HTTP/2 over TLS is not supported on OSX due to missing ALPN support.'.
warn: Microsoft.AspNetCore.Server.Kestrel[0]
      Unable to bind to https://localhost:5001 on the IPv6 loopback interface: 'HTTP/2 over TLS is not supported on OSX due to missing ALPN support.'.
crit: Microsoft.AspNetCore.Server.Kestrel[0]
      Unable to start Kestrel.
System.IO.IOException: Failed to bind to address https://localhost:5001.
 ---> System.AggregateException: One or more errors occurred. (HTTP/2 over TLS is not supported on OSX due to missing ALPN support.) (HTTP/2 over TLS is not supported on OSX due to missing ALPN support.)
 ---> System.NotSupportedException: HTTP/2 over TLS is not supported on OSX due to missing ALPN support.
   at Microsoft.AspNetCore.Server.Kestrel.Https.Internal.HttpsConnectionMiddleware..ctor(ConnectionDelegate next, HttpsConnectionAdapterOptions options, ILoggerFactory loggerFactory)
   at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.<>c__DisplayClass12_0.<UseHttps>b__0(ConnectionDelegate next)
   at Microsoft.AspNetCore.Server.Kestrel.Core.ListenOptions.Build()
   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.<>c__DisplayClass21_0`1.<<StartAsync>g__OnBind|0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindEndpointAsync(ListenOptions endpoint, AddressBindContext context)
   at Microsoft.AspNetCore.Server.Kestrel.Core.LocalhostListenOptions.BindAsync(AddressBindContext context)
   --- End of inner exception stack trace ---
 ---> (Inner Exception #1) System.NotSupportedException: HTTP/2 over TLS is not supported on OSX due to missing ALPN support.
   at Microsoft.AspNetCore.Server.Kestrel.Https.Internal.HttpsConnectionMiddleware..ctor(ConnectionDelegate next, HttpsConnectionAdapterOptions options, ILoggerFactory loggerFactory)
   at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.<>c__DisplayClass12_0.<UseHttps>b__0(ConnectionDelegate next)
   at Microsoft.AspNetCore.Server.Kestrel.Core.ListenOptions.Build()
   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.<>c__DisplayClass21_0`1.<<StartAsync>g__OnBind|0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindEndpointAsync(ListenOptions endpoint, AddressBindContext context)
   at Microsoft.AspNetCore.Server.Kestrel.Core.LocalhostListenOptions.BindAsync(AddressBindContext context)<---

Workaround

 webBuilder.UseStartup<Startup>()
   .ConfigureKestrel(options =>
   {
       options.Limits.MinRequestBodyDataRate = null;

       options.ListenAnyIP(50050,
             listenOptions => { listenOptions.Protocols = HttpProtocols.Http1; });

       options.ListenAnyIP(50051,
          listenOptions => { listenOptions.Protocols = HttpProtocols.Http2; });
  });