elliebot/src/EllieBot.Coordinator/CoordStartup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace EllieBot.Coordinator
{
    public class CoordStartup
    {
        public IConfiguration Configuration { get; }

        public CoordStartup(IConfiguration config)
            => Configuration = config;

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddGrpc();
            services.AddSingleton<CoordinatorRunner>();
            services.AddSingleton<IHostedService, CoordinatorRunner>(
                serviceProvider => serviceProvider.GetRequiredService<CoordinatorRunner>());
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapGrpcService<CoordinatorService>();

                endpoints.MapGet("/",
                    async context =>
                    {
                        await context.Response.WriteAsync(
                            "Communication with gRPC endpoints must be made through a gRPC client. To learn how to create a client, visit: https://go.microsoft.com/fwlink/?linkid=2086909");
                    });
            });
        }
    }
}