Backend cleanup (#146)

* Add ServerRegistration, begin refactoring to match frontend

* move graphData logic into ServerRegistration

* move ping updates/history into ServerRegistration

* start updating main app entry methods

* fix default rates.updateMojangStatus

* fix record loading delays on freshly booted instances

* move database loading logic to method + callback

* use data in frontend for type lookup instead of ping

* cleanup app.js

* reorganize methods to improve flow

* avoid useless mojang updates, remove legacy fields

* rename legacy fields for consistency

* finish restructure around App model

* ensure versions are sorted by release order

* filter errors sent to frontend to avoid data leaks

* fix version listing behavior on frontend

* 5.1.0

lib/logger.js

@@ -1,23 +1,17 @@
-/**
- * THIS IS LEGACY, UNMAINTAINED CODE
- * IT MAY (AND LIKELY DOES) CONTAIN BUGS
- * USAGE IS NOT RECOMMENDED
- */
-var winston = require('winston');
+const winston = require('winston')
 
-winston.remove(winston.transports.Console);
+winston.remove(winston.transports.Console)
 
-winston.add(winston.transports.File, { 
-	filename: 'minetrack.log' 
-});
+winston.add(winston.transports.File, {
+  filename: 'minetrack.log'
+})
 
 winston.add(winston.transports.Console, {
-	'timestamp': function() {
-		var date = new Date();
+  timestamp: () => {
+    const date = new Date()
+    return date.toLocaleTimeString() + ' ' + date.getDate() + '/' + (date.getMonth() + 1) + '/' + date.getFullYear().toString().substring(2, 4)
+  },
+  colorize: true
+})
 
-        return date.toLocaleTimeString() + ' ' + date.getDate() + '/' + (date.getMonth() + 1) + '/' + date.getFullYear().toString().substring(2, 4);
-	},
-	'colorize': true
-});
-
-module.exports = winston;
+module.exports = winston