Import custom error handler and add to middleware to catch all errors

src/index.ts

@@ -1,11 +1,13 @@
 import express, { type Request, type Response } from "express";
 import "dotenv/config";
 import jobRoutes from "./routes/jobRoutes.ts";
+import { errorHandler } from "./errors/errorHandler.ts";
 
 const app = express();
 app.use(express.json());
 
 app.use("/jobs", jobRoutes);
+app.use(errorHandler);
 
 app.listen(process.env.PORT || 3000, () => {
   console.log(`running on port ${process.env.PORT}`);