DI.CLI.Test.csproj

<?xml version="1.0" encoding="utf-8"?>
<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="AWSSDK.DynamoDBv2" Version="3.3.100.5" />
    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="2.2.0" />
    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="2.2.0" />
  </ItemGroup>

</Project>

Program.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace DICliTest
{
    public static class Program
    {
        public static void Main(string[] args)
        {
            var config = new ConfigurationBuilder()
                .AddJsonFile("appsettings.json", optional: true)
                .Build();
            var services = new ServiceCollection()
                .AddSingleton<IConfiguration>(config)
                .AddTransient<Startup>()
                ;
            var diContainer = services.BuildServiceProvider();

            var app = diContainer.GetService<Startup>();

            app.Run();
        }
    }
}

Startup.cs

using Microsoft.Extensions.Configuration;

namespace DICliTest
{
    public class Startup
    {
        public IConfiguration Configuration { get; }

        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public void Run()
        {
            
        }
    }
}