Use `curl` to send remote notification with Apple Push Notification Service HTTP/2 api

apns.sh

# Generate Public / Private Keys
openssl pkcs12 -in <.p12> -out <private-key.pem> -nocerts -nodes
openssl pkcs12 -in <.p12> -out <public-key.pem> -clcerts -nokeys

# Reinstall curl with nghttp2
brew install / reinstall curl --with-nghttp2
# Replace Mac OS default curl
brew link curl --force

# POST 
curl -v \
-d '{"aps": {"alert": "Hello World"}}' \
-H "apns-topic: <bundle-id>" \
--http2 \
--cert <public.pem> \
--key <private.pem> \
https://api.development.push.apple.com/3/device/<device-token>