IO-2348 add http auth for media.

server.js

@@ -123,6 +123,13 @@ app.post(
   twilio.webhook({ validate: process.env.NODE_ENV === "PRODUCTION" }),
   smsStatus.status
 );
+const smsFetchMedia = require("./server/sms/fetch-media");
+app.post(
+  "/sms/fetchmedia",
+  fb.validateFirebaseIdToken,
+  smsFetchMedia.fetchmedia
+);
+
 app.post(
   "/sms/markConversationRead",
   fb.validateFirebaseIdToken,