After some debuging I manged to find out that .NET Core Hosting bundle is needed. I installed version 3.1.3 from here .NET Downloads (Linux, macOS, and Windows)
Then in web.config I swiched on debuging of stdout. And there must be correct version of .NetCore runtime referenced in Origam.ServerCore.runtimeconfig.json file. In my case 3.1.3 which I installed earlier.
Neverthe less application is trying to start now, I get an unhandled exception error message in stdout:
Unhandled exception. Internal.Cryptography.CryptoThrowHelper+WindowsCryptographicException: The system cannot find the file specified.
at Internal.Cryptography.Pal.CertificatePal.FromBlobOrFile(Byte[] rawData, String fileName, SafePasswordHandle password, X509KeyStorageFlags keyStorageFlags)
at System.Security.Cryptography.X509Certificates.X509Certificate…ctor(String fileName, String password, X509KeyStorageFlags keyStorageFlags)
at System.Security.Cryptography.X509Certificates.X509Certificate2…ctor(String fileName, String password)
at Origam.ServerCore.Startup.ConfigureServices(IServiceCollection services) in D:\a\1\s\Origam.ServerCore\Startup.cs:line 131
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.InvokeCore(Object instance, IServiceCollection services)
at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.<>c__DisplayClass9_0.g__Startup|0(IServiceCollection serviceCollection)
at Microsoft.AspNetCore.Hosting.StartupLoader.ConfigureServicesDelegateBuilder1.<>c__DisplayClass15_0.<BuildStartupServicesFilterPipeline>g__RunPipeline|0(IServiceCollection services)* at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.Invoke(Object instance, IServiceCollection services) at Microsoft.AspNetCore.Hosting.ConfigureServicesBuilder.<>c__DisplayClass8_0.<Build>b__0(IServiceCollection services) at Microsoft.AspNetCore.Hosting.StartupLoader.ConfigureServicesDelegateBuilder
1.<>c__DisplayClass14_0.g__ConfigureServicesWithContainerConfiguration|0(IServiceCollection services)
at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.ConfigureServices(IServiceCollection services)
at Microsoft.AspNetCore.Hosting.WebHost.EnsureApplicationServices()
at Microsoft.AspNetCore.Hosting.WebHost.Initialize()
at Microsoft.AspNetCore.Hosting.WebHostBuilder.Build()
at Origam.ServerCore.Program.Main(String[] args) in D:\a\1\s\Origam.ServerCore\Program.cs:line 38
In browser u get this: