split express app from index file to make testing easier

backend/src/index.ts

@@ -1,17 +1,5 @@
-import express from "express";
-import dotenv from "dotenv";
-import * as bodyParser from 'body-parser';
-
-import * as routes from "./routes"
 import {SERVER_PORT} from "./config";
-
-dotenv.config();
-
-const app = express();
-app.use(bodyParser.json());
-
-// Configure routes
-routes.register(app);
+import app from "./server";
 
 // start the Express server
 app.listen(SERVER_PORT, () => {

backend/src/server.ts

@@ -0,0 +1,15 @@
+import express from "express";
+import dotenv from "dotenv";
+import * as bodyParser from 'body-parser';
+
+import * as routes from "./routes"
+
+dotenv.config();
+
+const app = express();
+app.use(bodyParser.json());
+
+// Configure routes
+routes.register(app);
+
+export default app;