Adding variables for voice examples

Author: superdiana

example.env

@@ -10,6 +10,10 @@ INSIGHT_NUMBER='NUMBER_FOR_INSIGHT'
 # Account
 SMS_CALLBACK_URL=
 
+# Voice
+NEXMO_APPLICATION_ID='YOUR_APPLICATION_ID"
+NEXMO_PRIVATE_KEY='PATH_TO_KEY_FILE"
+
 # Numbers
 COUNTRY_CODE='GB'
 NUMBER_SEARCH_CRITERIA='234'
@@ -20,4 +24,4 @@ NEXMO_NUMBER_FEATURES='SMS,VOICE'
 MESSAGES_APPLICATION_ID='12a3b4cd-a1b2-1ab2-a1b2-a1234bc5d678'
 VOICE_CALLBACK_TYPE='tel'
 VOICE_CALLBACK_VALUE='447700900002'
-VOICE_STATUS_URL='https://example.com/webhooks/status'
+VOICE_STATUS_URL='https://example.com/webhooks/status'