Merge pull request #49 from brenkem/fix-string-conversion

fix: use strconv.ParseInt instead of strconv.Atoi

service/telegram/telegram.go

@@ -78,11 +78,11 @@ All configuration options are also available via environment variables.`,
 				if len(v) <= 0 {
 					return helpers.ErrChannel
 				}
-				k, errStr := strconv.Atoi(v)
+				k, errStr := strconv.ParseInt(v, 10, 64)
 				if errStr != nil {
 					return errStr
 				}
-				telegramSvc.AddReceivers(int64(k))
+				telegramSvc.AddReceivers(k)
 			}
 
 			notifier.UseServices(telegramSvc)