+Get a twilio number, and on the configuration set the voice settings to
+"Webhooks/TwiML" and point the `A call comes in` hook to:
+the `/menus/main/` path of your dead drop installation. For example:
+`https://dead-drop.unlimited.piza/menus/main`. It must be accessible
+from the internet.
+
+You will also need your account sid. This is obtained from the "[Account
+Settings][account-settings]" area in the twilio dashboard.