added headers and error logging to push notifications
added headers and error logging to push notifications

ChemTics/meshblu,osokay/IotServerCore,Qbitus/meshblu,masato/meshblu-dev,octoblu/meshblu,dommert/meshblu,masato/meshblu,jaambee/meshblu,ChemTics/meshblu,atyenoria/meshblu,osokay/IotServerCore,atyenoria/meshblu,osokay/IotServerCore,ChemTics/meshblu,octoblu/meshblu,masato/meshblu,atyenoria/meshblu,Qbitus/meshblu,masato/meshblu-dev,Qbitus/meshblu,dommert/meshblu,jaambee/meshblu,dommert/meshblu,masato/meshblu,jaambee/meshblu,masato/meshblu-dev