fix(web): auto-npm-build only on release

Author: followynne

src/Serilog.Ui.Web/Serilog.Ui.Web.csproj

@@ -17,7 +17,7 @@
 		<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
 	</ItemGroup>
 
-	<Target Name="NpmRunBuild" BeforeTargets="BeforeBuild">
+	<Target Name="NpmRunBuild" BeforeTargets="BeforeBuild" Condition="'$(Configuration)'!='DEBUG'">
 		<Exec Command="npm run build" />
 	</Target>