Add healthcheck and do rollback if not working

.github/workflows/pipeline.yml

@@ -35,3 +35,5 @@ jobs:
           heroku_api_key: ${{secrets.HEROKU_API_KEY}}
           heroku_app_name: ${{secrets.HEROKU_APP}}
           heroku_email: ${{secrets.HEROKU_API_EMAIL}}
+          healthcheck: "https://${{secrets.HEROKU_APP}}/health"
+          rollbackonhealthcheckfailed: true

app.js

@@ -1,9 +1,18 @@
 const express = require('express')
 const app = express()
+const { version } = require('./package.json')
 
 // Heroku dynamically sets a port
 const PORT = process.env.PORT || 5000
 
+app.get('/health', (req, res) => {
+  res.send('ok')
+})
+
+app.get('/version', (req, res) => {
+  res.send(version)
+})
+
 app.use(express.static('dist'))
 
 app.listen(PORT, () => {

package.json

@@ -4,9 +4,9 @@
   "description": "Full Stack Open",
   "main": "src/index.js",
   "scripts": {
-    "start": "webpack-dev-server --open --mode development",
+    "dev": "webpack-dev-server --open --mode development",
     "start-test": "NODE_ENV=test node app.js",
-    "start-prod": "node app.js",
+    "start": "node app.js",
     "test": "jest",
     "eslint": "eslint './**/*.{js,jsx}'",
     "build": "webpack --mode production",