Fix README.md packaging path to support multiple locations

Author: jongalloway

src/NLWebNet/NLWebNet.csproj

@@ -12,9 +12,8 @@
 		<Copyright>Copyright (c) Jon Galloway 2025</Copyright>
 		<Description>A .NET library implementing the NLWeb protocol for natural language web interfaces. Provides minimal API endpoints, Model Context Protocol (MCP) integration, and streaming support for building conversational AI applications.</Description>
 		<PackageProjectUrl>https://github.com/jongalloway/NLWebNet</PackageProjectUrl>		<RepositoryUrl>https://github.com/jongalloway/NLWebNet</RepositoryUrl>
-		<RepositoryType>git</RepositoryType>
-		<PackageLicenseExpression>MIT</PackageLicenseExpression>
-		<PackageReadmeFile>README.md</PackageReadmeFile>
+		<RepositoryType>git</RepositoryType>		<PackageLicenseExpression>MIT</PackageLicenseExpression>
+		<PackageReadmeFile Condition="Exists('$(MSBuildThisFileDirectory)..\..\README.md') Or Exists('$(MSBuildThisFileDirectory)README.md')">README.md</PackageReadmeFile>
 		<PackageTags>nlweb;ai;conversation;minimal-api;mcp;streaming;rag;search;llm;dotnet9;alpha;prerelease</PackageTags>
 		<PackageReleaseNotes>Alpha release 0.1.0-alpha.3: Enhanced NuGet package metadata with copyright notice, repository type, and improved package title for better Package Manager display. Complete NLWeb protocol implementation with Minimal API endpoints (/ask, /mcp), Model Context Protocol integration, streaming support, and comprehensive testing. This is a proof-of-concept prerelease for testing and evaluation purposes only - not recommended for production use.</PackageReleaseNotes>
 		<!-- Symbol and Deterministic Build Configuration -->
@@ -63,8 +62,8 @@
 	<ItemGroup>
 		<FrameworkReference Include="Microsoft.AspNetCore.App" />
 	</ItemGroup>	<ItemGroup>
-		<None Include="..\..\README.md" Pack="true" PackagePath="\" Condition="Exists('..\..\README.md')" />
-		<None Include="README.md" Pack="true" PackagePath="\" Condition="Exists('README.md') And !Exists('..\..\README.md')" />
+		<None Include="$(MSBuildThisFileDirectory)..\..\README.md" Pack="true" PackagePath="\" Condition="Exists('$(MSBuildThisFileDirectory)..\..\README.md')" />
+		<None Include="$(MSBuildThisFileDirectory)README.md" Pack="true" PackagePath="\" Condition="Exists('$(MSBuildThisFileDirectory)README.md') And !Exists('$(MSBuildThisFileDirectory)..\..\README.md')" />
 	</ItemGroup>
 
 </Project>