eat urlpath prefix when generating file names

Author: Mpdreamz

src/Elastic.ApiExplorer/Landing/LandingNavigationItem.cs

@@ -146,7 +146,7 @@ public class EndpointNavigationItem(ApiEndpoint endpoint, IRootNavigationItem<IA
 	public int Depth => 0;
 
 	/// <inheritdoc />
-	public string Id { get; } = ShortId.Create(endpoint.Operations.First().ApiName + endpoint.Operations.First().Route);
+	public string Id { get; } = ShortId.Create(nameof(EndpointNavigationItem), endpoint.Operations.First().ApiName, endpoint.Operations.First().Route);
 
 	/// <inheritdoc />
 	public ApiEndpoint Index { get; } = endpoint;

src/Elastic.ApiExplorer/OpenApiGenerator.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information
 
 using System.IO.Abstractions;
+using System.Text.RegularExpressions;
 using Elastic.ApiExplorer.Landing;
 using Elastic.ApiExplorer.Operations;
 using Elastic.Documentation;
@@ -300,7 +301,7 @@ private async Task<IFileInfo> Render<T>(INavigationItem current, T page, ApiRend
 		IFileInfo OutputFile(INavigationItem currentNavigation)
 		{
 			const string indexHtml = "index.html";
-			var fileName = currentNavigation.Url + "/" + indexHtml;
+			var fileName = Regex.Replace(currentNavigation.Url + "/" + indexHtml, $"^{context.UrlPathPrefix}", string.Empty);
 			var fileInfo = _writeFileSystem.FileInfo.New(Path.Combine(context.DocumentationOutputDirectory.FullName, fileName.Trim('/')));
 			return fileInfo;
 		}