title: Create custom Kibana dashboard with custom query
body: <p>I have 2 log files, 1 for Apache and another for a custom app. To query the logs  for errors, the Apache log has log level tag as ERROR while the custom app has a response code tag 500.</p>
  
  <p>I have a dashboard that shows the total errors in Apache log that matches tag = Error and second for total errors that match response code = 500.</p>
  
  <p>My challenge is how to combine both errors as one rather than separating it. I have searched online for documentation on how to define query as global error = total with tag = error in apache log TYPE &amp; total with response = 500 in xxx log type.</p>
  
  <p>Thanks</p>