untillnesss · March 10, 2024 09:38 · Apr 1, 2022
diff --git a/readme.md b/readme.md
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+## Getting started
+
+A basic installation of [Node.js](https://nodejs.org/), [Express](https://expressjs.com/), and [Socket.io](https://socket.io/) served over `https://` using a [Letsencrypt SSL](https://letsencrypt.org/) certificate.
+
+### Step 1 - Build DO Droplet (or server of your choice)
+
+- Spin up DO droplet 
+- Set up DNS
+- Access the server via SSH
+
+### Step 2 - Install dependencies 
+
+- Update server: `apt-get update`
+- Install Nodejs: `apt-get install nodejs`
+- Install NPM: `apt-get install npm`
+- Install Express: `npm install express`
+
+### Step 3 - Create node app
+
+- Build app: `npm init`
+- Give the app a name: **Socket**
+- Complete other fields as desired or leave blank
+- Confirm details: `yes`
+
+### Step 4 - Install socket.io
+
+- Install socket.io: `npm install socket.io --save`
+
+### Step 5 - Install socket.io Javascript client library
+
+- Visit socket.io [Javascript client library](https://github.com/socketio/socket.io-client)
+- Enter the **dist** folder
+- Select the **socket.io.js** file
+- Copy the files URL: [https://github.com/socketio/socket.io-client/blob/master/dist/socket.io.js](https://github.com/socketio/socket.io-client/blob/master/dist/socket.io.js)
+- Clone the file to the server using:
+
+```wget https://github.com/socketio/socket.io-client/blob/master/dist/socket.io.js```
+
+### Step 6 - Create index.js
+
+- Create a file called index.js: `nano index.js`
+- Add the following to the new `index.js`:
+
+```js
+var app = require('express')()
+var server = require('http').Server(app)
+var io = require('socket.io')(server)
+
+var count = 0
+
+app.get('/', function(request, response) {
+
+  response.sendFile('/root/index.html')
+
+})
+
+io.on('connection', function(data) {
+
+  count++
+  data.send(count + " active sockets")
+
+})
+
+server.listen(80)
+
+```
+
+### Step 7 - Create index.html
+
+- Create a file called index.html: `nano index.html`
+- Add the following to the new `index.html`:
+
+```html
+<script src="/socket.io/socket.io.js"></script>
+<script>
+var socket = io()
+
+socket.on('message', function(data) {
+
+  document.write(data)
+
+})
+
+</script>
+
+```
+
+### Step 7 - Run the node server
+
+- Run node: `nodejs index.js`
+
+The site can now be viewed over `http://`.
+
+## Install Letsencrypt SSL
+
+Install Certbot:
+
+```sudo apt install certbot```
+
+Now run CertBot and follow instructions, selecting **1** as the option to continue: 
+
+```sudo certbot certonly```
+
+## Set up index.js
+
+Update `index.js` to include the following, replacing EXAMPLE.COM with the live domain:
+
+```js
+var app = require('express')()
+//var server = require('http').Server(app)
+var https = require('https');
+var fs = require( 'fs' );
+var server = https.createServer({     
+  key: fs.readFileSync('/etc/letsencrypt/live/EXAMPLE.COM/privkey.pem'),     
+  cert: fs.readFileSync('/etc/letsencrypt/live/EXAMPLE.COM/cert.pem'),     
+  ca: fs.readFileSync('/etc/letsencrypt/live/EXAMPLE.COM/chain.pem'),     
+
+  requestCert: false,     
+  rejectUnauthorized: false },app);
+
+var io = require('socket.io')(server)
+
+var count = 0
+
+app.get('/', function(request, response) {
+
+  response.sendFile('/root/index.html')
+
+})
+
+io.on('connection', function(data) {
+
+  count++
+  data.send(count + " active sockets")
+
+})
+
+server.listen(443);
+```
+
+Run node `nodejs index.js` and view site over `https://`.
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