add body-parser middleware to server

src/class/Server.ts

@@ -1,6 +1,6 @@
 import express from 'express';
+import bodyParser from 'body-parser';
 import helmet from 'helmet';
-import { promises as fs } from 'fs';
 import { Server as HTTPServer } from 'http';
 import { Collection, ServerManagement, Route } from '.';
 
@@ -51,6 +51,7 @@ export default class Server {
 
   public init() {
     this.app.set('trust proxy', 'loopback');
+    this.app.use(bodyParser.json());
     this.app.use(helmet({
       hsts: false,
       hidePoweredBy: false,