HttpResponse getRoot() {
        Slime slime = new Slime();
        slime.setObject().setArray("resources").addObject().setString("url", "/reindexing/v1/status");
        return new SlimeJsonResponse(slime);
    }
Allows inspecting reindexing status over HTTP.

@author jonmv
clustercontroller-reindexer/src/main/java/ai/vespa/reindexing/http/ReindexingV1ApiHandler.java