Use same lifespan for cookies as for tokens

package.json

@@ -92,6 +92,7 @@
     "minimist": "^1.2.0",
     "mongoose": "^4.9.8",
     "morgan": "^1.8.1",
+    "ms": "^2.0.0",
     "natural": "^0.5.0",
     "node-emoji": "^1.5.1",
     "node-fetch": "^1.6.3",

services/passport.js

@@ -10,6 +10,7 @@ const uuid = require('uuid');
 const debug = require('debug')('talk:passport');
 const {createClient} = require('./redis');
 const bowser = require('bowser');
+const ms = require('ms');
 
 // Create a redis client to use for authentication.
 const client = createClient();
@@ -39,7 +40,7 @@ const SetTokenForSafari = (req, res, token) => {
   if (browser.ios || browser.safari) {
     res.cookie('authorization', token, {
       httpOnly: true,
-      expires: new Date(Date.now() + 900000)
+      expires: new Date(Date.now() + ms(JWT_EXPIRY))
     });
   }
 };

yarn.lock

@@ -5365,6 +5365,10 @@ ms@0.7.3, ms@^0.7.1:
   version "0.7.3"
   resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.3.tgz#708155a5e44e33f5fd0fc53e81d0d40a91be1fff"
 
+ms@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
+
 muri@1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/muri/-/muri-1.2.1.tgz#ec7ea5ce6ca6a523eb1ab35bacda5fa816c9aa3c"