Custom analyzer for Statiq to validate that my posts have a Description property

PostsShouldHaveDescriptions.cs

using Markdig.Syntax;
using Microsoft.Extensions.Logging;
using Statiq.Common;

namespace EZHart
{
    public class PostsShouldHaveDescriptions : SyncMarkdownAnalyzer
    {
        protected override void Analyze(MarkdownDocument markdown, IDocument document, IAnalyzerContext context)
        {
			var description = document.GetString(WebKeys.Description);
			
			if(string.IsNullOrEmpty(description))
			{
				context.AddAnalyzerResult(document, $"{document.Source}: posts should have descriptions.");
			}
        }
    }
}