Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.SpaServices.AngularCli;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.AspNetCore.DataProtection;

namespace Ferrous
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc()
            .SetCompatibilityVersion(CompatibilityVersion.Version_2_1)
            .AddJsonOptions(
                options => options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
            );

            services.AddSignalR();

            services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
                .AddCookie();

            services.AddEntityFrameworkNpgsql().AddDbContext<Models.ferrousContext>(options =>
                options.UseNpgsql(Configuration.GetConnectionString("DatabaseConnectionString")));

            services.AddDataProtection()
                .PersistKeysToFileSystem(new System.IO.DirectoryInfo(Configuration.GetValue<string>("KeyStore")))
                .SetApplicationName("Ferrous")
                .SetDefaultKeyLifetime(System.TimeSpan.FromDays(30));

            // In production, the Angular files will be served from this directory
            services.AddSpaStaticFiles(configuration =>
            {
                configuration.RootPath = "ClientApp/dist";
            });
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            /** Aply migrations */
            using (var serviceScope = app.ApplicationServices.GetService<IServiceScopeFactory>().CreateScope())
            {
                var context = serviceScope.ServiceProvider.GetRequiredService<Models.ferrousContext>();
                context.Database.Migrate();
            }

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseHttpsRedirection();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }

            app.UseAuthentication();
            app.UseStaticFiles();
            app.UseSpaStaticFiles();

            app.UseForwardedHeaders(new ForwardedHeadersOptions
            {
                ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
            });

            app.UseSignalR(routes =>
            {
                routes.MapHub<WebSocketHubs.BuildingUpdateHub>(WebSocketHubs.BuildingUpdateHub.BuildingWebsocketUrl);
            });

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller}/{action=Index}/{id?}");
            });

            app.UseSpa(spa =>
            {
                // To learn more about options for serving an Angular SPA from ASP.NET Core,
                // see https://go.microsoft.com/fwlink/?linkid=864501

                spa.Options.SourcePath = "ClientApp";

                if (env.IsDevelopment())
                {
                    spa.UseProxyToSpaDevelopmentServer("http://localhost:4200/");
                }
            });
        }
    }
}