API-10: Adding PartyPlaner register endpoint (#3)

- Also various other improvements

Co-authored-by: Patrick Müller <patrick@mueller-patrick.tech>
Reviewed-on: #3
Co-authored-by: Patrick Müller <patrick@plutodev.de>
Co-committed-by: Patrick Müller <patrick@plutodev.de>

app.ts

@@ -1,7 +1,10 @@
 import express from 'express';
 import * as http from 'http';
-import * as bodyparser from 'body-parser';
 import * as dotenv from 'dotenv';
+// Router imports
+import {partyPlanerRouter} from './src/models/partyplaner/PartyPlaner.router';
+import {highlightMarkerRouter} from './src/models/twitch-highlight-marker/HighlightMarker.router';
+import {dhbwServiceRouter} from './src/models/dhbw-service/DHBWService.router';
 
 dotenv.config();
 
@@ -12,16 +15,11 @@ if (!process.env.PORT) {
 
 const port: number = parseInt(process.env.PORT, 10);
 
-// Router imports
-import {partyPlanerRouter} from "./src/models/partyplaner/PartyPlaner.router";
-import {highlightMarkerRouter} from "./src/models/twitch-highlight-marker/HighlightMarker.router";
-import { dhbwServiceRouter } from './src/models/dhbw-service/DHBWServiceRouter';
-
 const app: express.Application = express();
 const server: http.Server = http.createServer(app);
 
 // here we are adding middleware to parse all incoming requests as JSON
-app.use(bodyparser.json());
+app.use(express.json());
 
 // Add routers
 app.use('/dhbw-service', dhbwServiceRouter);