Update README.md

Fix: Location of default config.py and logging.ini obtained from samples (#227)

FIX: Duplicate "pemdir" definition in install.py (#216)

fix(apns): fix apns base url and add required header

fix broadcast for device_type_android and fcm (#214)

chore(tokens): clean up v2/tokens endpoint

test(push): add positive test case for push api

test(apns): add test coverage

build(ci): fix unit test

fix(moodle): better moodle notification msg

test(fcm): add fcm unit test

fix(neapp): fix import error

fix(moodle): update moodle hooks

fix(apns): cache jwt for 50 mins

chore(util): json_decode comment