better install script

Author: apocas

install.js

@@ -1,9 +1,18 @@
 var MongoClient = require('mongodb').MongoClient,
   ObjectId = require('mongodb').ObjectID,
-  config = require('./config');
+  fs = require('fs');
 
 console.log('Running install script.');
 
+try {
+  fs.statSync('./config').isFile();
+} catch (err) {
+  console.log('ERROR: config.js missing!');
+  process.exit(1);
+}
+
+var config = require('./config');
+
 var insertUser = function(db, callback) {
   db.collection('users').insertOne({
     'auth': {
@@ -45,4 +54,4 @@ MongoClient.connect(config.mongodb || process.env.CLOUDASH_MONGODB, function(err
     console.log('Installation finished.');
     console.log('Use credentials admin:admin at ' + config.url);
   });
-});
+});