enable detailed errors by default to simplify diagnosing issues

src/SMAPI.Web/Program.cs

@@ -16,6 +16,8 @@ namespace StardewModdingAPI.Web
             // configure web server
             WebHost
                 .CreateDefaultBuilder(args)
+                .CaptureStartupErrors(true)
+                .UseSetting("detailedErrors", "true")
                 .UseStartup<Startup>()
                 .Build()
                 .Run();

src/SMAPI.Web/Startup.cs

@@ -192,8 +192,7 @@ namespace StardewModdingAPI.Web
         public void Configure(IApplicationBuilder app, IHostingEnvironment env)
         {
             // basic config
-            if (env.IsDevelopment())
-                app.UseDeveloperExceptionPage();
+            app.UseDeveloperExceptionPage();
             app
                 .UseCors(policy => policy
                     .AllowAnyHeader()