init

src/main.ts

@@ -0,0 +1,24 @@
+import express from 'express';
+import { config } from 'dotenv';
+
+import { errorHandle } from './utils/error-handling';
+
+config();
+
+const app = express();
+
+const port = process.env.PORT;
+
+app.get('/', (req, res) => {
+    res.send('hello')
+})
+
+app.get('/error', (req, res) => {
+    throw new Error('some mistake')
+})
+
+
+app.use(errorHandle);
+app.listen(port, () => {
+    console.log(`listen on http://localhost:${port}`);
+});

src/utils/error-handling.ts

@@ -0,0 +1,5 @@
+export const errorHandle = (error, req, res, next) => {
+    res.status(500).send({
+        error: error.message || 'some error'
+    });
+};