Add a healthcheck endpoint

[thamudi]

• Create an API endpoint which returns status code 200
• Choose a short, good message
• Update the SafePass monitors on Up (ask George or Tamim for help)

Resources & recommendations

• Since it's a flask API all you need to do is create a get def and provide the decorator with the /healthcheck route.
• Checkout a new branch from development. Use the dev-frozen branch for reference.

Your starting point should be in main.py

[mbaraa]

@thamudi the Kuma update will be done after deploying the merged branch!