tweak log parser startup

src/SMAPI.Web/Program.cs

@@ -1,4 +1,4 @@
-using System.IO;
+using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
 
 namespace StardewModdingAPI.Web
@@ -14,10 +14,8 @@ namespace StardewModdingAPI.Web
         public static void Main(string[] args)
         {
             // configure web server
-            new WebHostBuilder()
-                .UseKestrel()
-                .UseContentRoot(Directory.GetCurrentDirectory())
-                .UseIISIntegration()
+            WebHost
+                .CreateDefaultBuilder(args)
                 .UseStartup<Startup>()
                 .Build()
                 .Run();

src/SMAPI.Web/Startup.cs

@@ -33,7 +33,7 @@ namespace StardewModdingAPI.Web
                 .SetBasePath(env.ContentRootPath)
                 .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
                 .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
-                .Add(new BeanstalkEnvPropsConfigProvider()) //.AddEnvironmentVariables()
+                .Add(new BeanstalkEnvPropsConfigProvider())
                 .Build();
         }
 
@@ -63,6 +63,10 @@ namespace StardewModdingAPI.Web
         {
             loggerFactory.AddConsole(this.Configuration.GetSection("Logging"));
             loggerFactory.AddDebug();
+
+            if (env.IsDevelopment())
+                app.UseDeveloperExceptionPage();
+
             app
                 .UseCors(policy => policy
                     .AllowAnyHeader()