feat: use date in log timestamp

I find it quite hard to look something up in the logs, when there is no date in the log file. The time itself is not sufficient for debugging, hence I suggest also logging the date.

js/app.js

@@ -14,7 +14,7 @@ var path = require("path");
 require("module-alias/register");
 
 // add timestamps in front of log messages
-require("console-stamp")(console, "HH:MM:ss.l");
+require("console-stamp")(console, "yyyy-mm-dd HH:MM:ss.l");
 
 // Get version number.
 global.version = JSON.parse(fs.readFileSync("package.json", "utf8")).version;