handle expire time as int

lib/document_stores/postgres.js

@@ -7,9 +7,10 @@ const {Pool} = require('pg');
 
 // A postgres document store
 var PostgresDocumentStore = function (options) {
-  this.expireJS = options.expire;
+  this.expireJS = parseInt(options.expire);
 
   const connectionString = process.env.DATABASE_URL || options.connectionUrl;
+  console.log(connectionString)
   this.pool = new Pool({connectionString});
 };