This endpoint returns the internal readiness state used by
the realtime code to indicate whether HedgeDoc is performing
properly. As it only returns the state of a variable, it is
less resource hungry compared to a call to /status for
checking the health of HedgeDoc.
By prepending the route with an underscore, it should not be conflicting with already created pads in FreeURL mode.
Signed-off-by: Erik Michelson <github@erik.michelson.eu>
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