static AggregatedHttpResponse jsonResponse(byte[] body) {
    return AggregatedHttpResponse.of(ResponseHeaders.builder(200)
      .contentType(MediaType.JSON)
      .setInt(HttpHeaderNames.CONTENT_LENGTH, body.length).build(), HttpData.wrap(body));
  }
The Cache-Control max-age (seconds) for /api/v2/services /api/v2/remoteServices and
/api/v2/spans
zipkin-server/src/main/java/zipkin2/server/internal/ZipkinQueryApiV2.java