fix(docs): Add links to NuGet packages in README.md

README.md

@@ -1,11 +1,22 @@
+[![Nuget](https://img.shields.io/nuget/v/VMelnalksnis.PaperlessDotNet?label=PaperlessDotNet)](https://www.nuget.org/packages/VMelnalksnis.PaperlessDotNet/)
+[![Nuget](https://img.shields.io/nuget/v/VMelnalksnis.PaperlessDotNet.DependencyInjection?label=PaperlessDotNet.DependencyInjection)](https://www.nuget.org/packages/VMelnalksnis.PaperlessDotNet.DependencyInjection/)
 [![Codecov](https://img.shields.io/codecov/c/github/VMelnalksnis/PaperlessDotNet)](https://app.codecov.io/gh/VMelnalksnis/PaperlessDotNet)
 [![Run tests](https://github.com/VMelnalksnis/PaperlessDotNet/actions/workflows/test.yml/badge.svg?branch=master)](https://github.com/VMelnalksnis/PaperlessDotNet/actions/workflows/test.yml?query=branch%3Amaster)
 
 # PaperlessDotNet
 .NET client for the [Paperless-ngx](https://github.com/paperless-ngx/paperless-ngx) API.
 
 # Usage
-1. Add configuration (for optional values see [options](source/VMelnalksnis.PaperlessDotNet.DependencyInjection/PaperlessOptions.cs))
+
+A separate [NuGet package](https://www.nuget.org/packages/VMelnalksnis.PaperlessDotNet.DependencyInjection/)
+is provided for ASP.NET Core
+([IConfiguration](https://docs.microsoft.com/en-us/dotnet/api/microsoft.extensions.configuration.iconfiguration)
+and [IServiceCollection](https://docs.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.iservicecollection))
+.
+For use outside of ASP.NET Core, see the
+[configuration](source/VMelnalksnis.PaperlessDotNet.DependencyInjection/ServiceCollectionExtensions.cs).
+
+1. Add configuration (see [options](source/VMelnalksnis.PaperlessDotNet.DependencyInjection/PaperlessOptions.cs))
    ```yaml
    "Paperless": {
        "BaseAddress": "",