StartUp.cs

ConfigureServices

            services.AddMvc();

            services.AddReact();
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            services.AddNodeServices();

            services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));

Configure

            // Initialise ReactJS.NET. Must be before static files.
            app.UseReact(config =>
            {
                config
                  .SetLoadBabel(false)
                  .AddScriptWithoutTransform("~/build/server.bundle.js");
            });