updated README

src/main/resources/README.md

@@ -1,9 +1,14 @@
 Android
 =======
 The file serviceAccountKey.json should be placed in this folder.
-Create and download from https://console.firebase.google.com/project/XXXXXXX/settings/serviceaccounts/adminsdk
+Create and download from https://console.firebase.google.com/project/XXXXXXX/settings/serviceaccounts/adminsdk, for example
+https://console.firebase.google.com/project/bisqnotifications/settings/serviceaccounts/adminsdk
 
 iOS
 ===
 The push notification certificate needs to be renewed every year. The file push_certificate.production.p12 should be placed in this folder.
 Create and download from https://developer.apple.com/account/ios/certificate/?teamId=XXXXXX
+Then add the *.cer fie to your keychain.
+You will probably observe that keychain does not allow you to export the certificate as *.p12 file.
+In keychain, go to "My certificates", expand the Apple Push Service certificate and select both lines.
+Now, you can export as *.p12 file