Use the tempkey.rsa file in memory.

Resolve #3515

templates/app/aspnet-core/test/MyCompanyName.MyProjectName.TestBase/MyProjectNameTestBaseModule.cs

@@ -4,6 +4,7 @@ using Volo.Abp.Authorization;
 using Volo.Abp.Autofac;
 using Volo.Abp.BackgroundJobs;
 using Volo.Abp.Data;
+using Volo.Abp.IdentityServer;
 using Volo.Abp.Modularity;
 using Volo.Abp.Threading;
 
@@ -17,6 +18,19 @@ namespace MyCompanyName.MyProjectName
         )]
     public class MyProjectNameTestBaseModule : AbpModule
     {
+        public override void PreConfigureServices(ServiceConfigurationContext context)
+        {
+            PreConfigure<AbpIdentityServerBuilderOptions>(options =>
+            {
+                options.AddDeveloperSigningCredential = false;
+            });
+
+            PreConfigure<IIdentityServerBuilder>(identityServerBuilder =>
+            {
+                identityServerBuilder.AddDeveloperSigningCredential(false, System.Guid.NewGuid().ToString());
+            });
+        }
+
         public override void ConfigureServices(ServiceConfigurationContext context)
         {
             Configure<AbpBackgroundJobOptions>(options =>