@Override protected Response newResponse() {
                Response response = new Response(Response.Status.OK);
                response.headers().add("Content-Type", List.of("application/json"));
                return response;
            }
Handler that outputs meta-info about the deployed Vespa application, and status of components and chains.

@author gjoranv
@author Einar M R Rosenvinge
@author bjorncs
container-disc/src/main/java/com/yahoo/container/handler/observability/ApplicationStatusHandler.java