=== Healthcheck ===
 
  * https://dev.to/idsulik/a-beginners-guide-to-docker-health-checks-and-container-monitoring-3kh6
  * https://www.geeksforgeeks.org/docker-healthcheck-instruction/#docker-healthcheck-examples
  * [[http://stackoverflow.com/questions/15562446/how-to-stop-flask-application-without-using-ctrl-c|How to stop flask application without using ctrl-c]]
  * [[https://www.scoutapm.com/blog/how-to-use-docker-healthcheck|How to Use Docker Healthcheck]]