Examples folder start with expressjs

Signed-off-by: Fabio José <[email protected]>

Author: fabiojose

examples/express-ex/index.js

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+var express = require('express');
+var app = express();
+
+app.get('/', function (req, res) {
+    res.send('Hello World!');
+});
+
+app.listen(3000, function () {
+    console.log('Example app listening on port 3000!');
+});
+

examples/express-ex/package.json

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+{
+  "name": "express-ex",
+  "version": "1.0.0",
+  "description": "Examples to use CloudEvents with Express",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [
+    "cloudevents",
+    "express"
+  ],
+  "author": "[email protected]",
+  "license": "Apache-2.0",
+  "dependencies": {
+    "express": "^4.17.1"
+  }
+}