Add error pages.

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.HttpApi.HostWithIds/MyProjectNameHttpApiHostModule.cs

@@ -18,6 +18,7 @@ using Volo.Abp.Account.Web;
 using Volo.Abp.AspNetCore.Authentication.JwtBearer;
 using Volo.Abp.AspNetCore.MultiTenancy;
 using Volo.Abp.AspNetCore.Mvc;
+using Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared;
 using Volo.Abp.AspNetCore.Serilog;
 using Volo.Abp.Autofac;
 using Volo.Abp.Localization;
@@ -152,6 +153,16 @@ namespace MyCompanyName.MyProjectName
         public override void OnApplicationInitialization(ApplicationInitializationContext context)
         {
             var app = context.GetApplicationBuilder();
+            var env = context.GetEnvironment();
+
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
+            else
+            {
+                app.UseErrorPage();
+            }
 
             app.UseCorrelationId();
             app.UseVirtualFiles();

templates/app/aspnet-core/src/MyCompanyName.MyProjectName.IdentityServer/MyProjectNameIdentityServerModule.cs

@@ -139,6 +139,16 @@ namespace MyCompanyName.MyProjectName
         public override void OnApplicationInitialization(ApplicationInitializationContext context)
         {
             var app = context.GetApplicationBuilder();
+            var env = context.GetEnvironment();
+
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
+            else
+            {
+                app.UseErrorPage();
+            }
 
             app.UseCorrelationId();
             app.UseVirtualFiles();