Add healthcheck endpoints and scripts

05-example-web-application/api-node/healthcheck/healthcheck.js

@@ -0,0 +1,21 @@
+var http = require('http');
+
+var options = {
+  timeout: 2000,
+  host: 'localhost',
+  port: process.env.PORT || 3000,
+  path: '/ping',
+};
+
+var request = http.request(options, (res) => {
+  console.info('STATUS: ' + res.statusCode);
+  process.exitCode = res.statusCode === 200 ? 0 : 1;
+  process.exit();
+});
+
+request.on('error', function (err) {
+  console.error('ERROR', err);
+  process.exit(1);
+});
+
+request.end();

05-example-web-application/api-node/src/index.js

@@ -4,7 +4,7 @@ const express = require('express');
 const morgan = require('morgan');
 
 const app = express();
-const port = 3000;
+const port = process.env.PORT || 3000;
 
 // setup the logger
 app.use(morgan('tiny'));
@@ -16,6 +16,10 @@ app.get('/', async (req, res) => {
   res.send(response);
 });
 
+app.get('/ping', async (_, res) => {
+  res.send('pong');
+});
+
 const server = app.listen(port, () => {
   console.log(`Example app listening on port ${port}`);
 });