feat: Add Resend with Express example

Author: zenorocha

.env.example

@@ -0,0 +1 @@
+RESEND_API_KEY=""

.gitignore

@@ -0,0 +1,2 @@
+.env
+node_modules

README.md

@@ -1,6 +1,6 @@
-# Resend with Example
+# Resend with Express
 
-This example shows how to use Resend with [Example](https://example.com).
+This example shows how to use Resend with [Express](https://expressjs.com).
 
 ## Prerequisites
 
@@ -11,18 +11,26 @@ To get the most out of this guide, you’ll need to:
 
 ## Instructions
 
-1. Replace `re_123456789` on `example.ts` with your API key.
+1. Define environment variables in `.env` file.
 
 2. Install dependencies:
 
   ```sh
-TBD
+npm install
+# or
+yarn
   ```
 
-3. Execute the following command:
+3. Run Express locally:
 
   ```sh
-TBD
+npm run dev
+  ```
+
+4. Open URL in the browser:
+
+  ```
+http://localhost:3000
   ```
 
 ## License

index.js

@@ -0,0 +1,31 @@
+require('dotenv').config()
+
+const { Resend } = require('resend');
+const resend = new Resend(process.env.RESEND_API_KEY);
+
+const express = require('express');
+const app = express();
+
+app.get('/', async (req, res) => {
+  try {
+    const data = await resend.sendEmail({
+      from: 'onboarding@resend.dev',
+      to: 'delivered@resend.dev',
+      subject: "Hello world",
+      html: "<strong>It works!</strong>",
+    });
+
+    res.status(200).json(data);
+  }
+  catch(e) {
+    res.status(400).json(e);
+  }
+})
+
+app.listen(3000, () => {
+  if (!process.env.RESEND_API_KEY) {
+    throw `Abort: You need to define RESEND_API_KEY in the .env file.`;
+  }
+  
+  console.log('Listening on http://localhost:3000')
+})

package.json

@@ -0,0 +1,12 @@
+{
+  "name": "resend-express-example",
+  "private": true,
+  "scripts": {
+    "dev": "node index.js"
+  },
+  "dependencies": {
+    "dotenv": "^16.0.1",
+    "express": "^4.18.1",
+    "resend": "^0.8.0"
+  }
+}