Fix build.props files

Directory.Build.props

@@ -1,13 +1,16 @@
 <Project>
-    <PropertyGroup>
-        <!-- summary is not migrated from project.json, but you can use the <Description> property for that if needed. -->
-        <PackageTags>f#, fsharp</PackageTags>
-        <PackageProjectUrl>https://github.com/PolinaSavelyeva/ImageProcessing</PackageProjectUrl>
-        <PackageLicenseUrl>https://github.com/PolinaSavelyeva/ImageProcessing/blob/main/LICENSE.md</PackageLicenseUrl>
-        <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
-        <RepositoryType>git</RepositoryType>
-        <Authors>PolinaSavelyeva</Authors>
-        <RepositoryUrl>https://github.com/PolinaSavelyeva/ImageProcessing</RepositoryUrl>
-        <!-- owners is not supported in MSBuild -->
-    </PropertyGroup>
+<PropertyGroup>
+    <PackageTags>f#, fsharp</PackageTags>
+    <PackageProjectUrl>https://github.com/PolinaSavelyeva/ImageProcessing</PackageProjectUrl>
+    <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
+    <PackageLicenseFile>LICENSE.md</PackageLicenseFile>
+    <PackageReadmeFile>README.md</PackageReadmeFile> <!--https://docs.microsoft.com/en-gb/nuget/reference/msbuild-targets#packagereadmefile -->
+    <RepositoryType>git</RepositoryType>
+    <Authors>PolinaSavelyeva</Authors>
+    <RepositoryUrl>https://github.com/PolinaSavelyeva/ImageProcessing</RepositoryUrl>
+</PropertyGroup>
+<ItemGroup>
+    <None Include="$(MSBuildThisFileDirectory)README.md" Pack="true" PackagePath="/"/>
+    <None Include="$(MSBuildThisFileDirectory)LICENSE.md" Pack="true" PackagePath="/"/>
+</ItemGroup>
 </Project>

src/Directory.Build.props

@@ -1,7 +1,14 @@
 <Project>
     <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
     <PropertyGroup>
-        <IsTestProject>false</IsTestProject>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
+        <IsPackable>true</IsPackable>
+        <IsTestProject>false</IsTestProject>
+
+        <!-- Sourcelink -->
+        <PublishRepositoryUrl>true</PublishRepositoryUrl>
+        <EmbedUntrackedSources>true</EmbedUntrackedSources>
+        <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
     </PropertyGroup>
+
 </Project>

tests/Directory.Build.props

@@ -1,6 +1,7 @@
 <Project>
     <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
     <PropertyGroup>
+        <IsPackable>false</IsPackable>
         <IsTestProject>true</IsTestProject>
     </PropertyGroup>
 </Project>