add little message reminder inside the latest migration for updating nginx config, until #352 can ever get done

migrations/0.1.3.js

@@ -1,7 +1,7 @@
 'use strict';
 
 module.exports = async(db, redis) => {
-	console.log('add u to posts');
+	console.log('add unix time to posts for (u) links');
 	await db.collection('posts').aggregate([
 		{
 			$project: {
@@ -16,4 +16,5 @@ module.exports = async(db, redis) => {
 			}
 		}
 	]).toArray();
+	console.log('=\nHEY, you should update your nginx configs. 0.1.3 had some nginx config changes to support new favicon location and gulp task. Refer to step 6 of README if you forgot how\n=')
 };