Merge pull request #1148 from mfornasa/feature/nodejs

Node.js example with dependency handling and hot-reload

Author: dgageot

integration/examples/nodejs/README.adoc

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+=== Example: Node.js with hot-reload
+:icons: font
+
+Simple example based on Node.js demonstrating the file synchronization mode.
+
+==== Init
+`skaffold dev`
+
+==== Workflow
+* Make some changes to `index.js`:
+** The file will be synchronized to the cluster
+** `nodemon` will restart the application
+* Make some changes to `package.json`:
+** The full build/push/deploy process will be triggered, fetching dependencies from `npm`
+
+

integration/examples/nodejs/backend/.dockerignore

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+node_modules
+*.swp

integration/examples/nodejs/backend/.gitignore

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+node_modules
+*.swp

integration/examples/nodejs/backend/Dockerfile

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+FROM node:8.12.0-alpine
+
+WORKDIR /opt/backend
+CMD ["npm", "run", "dev"]
+
+COPY . .
+RUN npm install

integration/examples/nodejs/backend/index.js

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

integration/examples/nodejs/backend/k8s/pod.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: node
+spec:
+  containers:
+  - name: node
+    image: gcr.io/k8s-skaffold/node-example
+    ports:
+    - containerPort: 3000