adding express server example

Author: jkyberneees

demos/basic-express.js

@@ -0,0 +1,42 @@
+const gateway = require('../index')
+const express = require('express')
+const PORT = process.env.PORT || 8080
+
+gateway({
+  server: express(),
+
+  middlewares: [
+    require('cors')(),
+    require('helmet')()
+  ],
+
+  routes: [{
+    prefix: '/public',
+    target: 'http://localhost:3000',
+    docs: {
+      name: 'Public Service',
+      endpoint: 'swagger.json',
+      type: 'swagger'
+    }
+  }, {
+    prefix: '/admin',
+    target: 'http://localhost:3001',
+    middlewares: [
+      require('express-jwt')({
+        secret: 'shhhhhhared-secret'
+      })
+    ]
+  }]
+}).listen(PORT, () => {
+  console.log(`API Gateway listening on ${PORT} port!`)
+})
+
+const service1 = require('restana')({})
+service1
+  .get('/hi', (req, res) => res.send('Hello World!'))
+  .start(3000).then(() => console.log('Public service listening on 3000 port!'))
+
+const service2 = require('restana')({})
+service2
+  .get('/users', (req, res) => res.send([]))
+  .start(3001).then(() => console.log('Admin service listening on 3001 port!'))