Update startup behaviour to run initial sync if db is empty

index.js

@@ -4,6 +4,7 @@
 var express = require('express'),
 	cronJob = require('cron').CronJob,
 	winston = require('winston'),
+	rdb = require('./lib/redis'),
 	app = express(),
 	// search = require('./lib/search'),
 	packages = require('./lib/packages'),
@@ -16,4 +17,12 @@ winston.info('NodeBB Package Manager - Initializing');
 new cronJob('0 * * * *', packages.registry.sync, null, true);
 
 app.listen(process.env.PORT || 3000);
-console.log('NodeBB Package Manager - Ready');
+winston.info('NodeBB Package Manager - Ready');
+
+// Check packaged sorted set. If missing, conduct initial sync
+rdb.zcard('packages', function(err, numPackages) {
+	if (numPackages === 0) {
+		winston.info('No packages detected in database, running initial sync');
+		packages.registry.sync(true);
+	}
+});