Change API root endpoint to GET method (#1833)

* Change root endpoint to GET method

This is just a test.. for some reason HEAD is not allowed in staging although it works on edge

* Use GET instead head

Because the endpoint changed

Author: reakaleek

src/Elastic.Documentation.Site/Assets/web-components/SearchOrAskAi/SearchOrAskAiButton.tsx

@@ -33,7 +33,7 @@ export const SearchOrAskAiButton = () => {
     const { data: isApiAvailable } = useQuery({
         queryKey: ['api-health'],
         queryFn: async () => {
-            const response = await fetch('/docs/_api/v1/', { method: 'HEAD' })
+            const response = await fetch('/docs/_api/v1/')
             return response.ok
         },
         staleTime: 5 * 60 * 1000, // 5 minutes

src/api/Elastic.Documentation.Api.Infrastructure/MappingsExstension.cs

@@ -15,7 +15,7 @@ public static class MappingsExtension
 {
 	public static void MapElasticDocsApiEndpoints(this IEndpointRouteBuilder group)
 	{
-		_ = group.MapMethods("/", [HttpMethods.Head], () => Results.Empty);
+		_ = group.MapGet("/", () => Results.Empty);
 		MapAskAiEndpoint(group);
 		MapSearchEndpoint(group);
 	}