nginx_aws.md

Node.js Deployment

Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt

1. Create Free AWS Account

Create free AWS Account at https://aws.amazon.com/

2. Create and Lauch an EC2 instance and SSH into machine

I would be creating a t2.medium ubuntu machine for this demo.

3. Install Node and NPM

curl -sL https://deb.nodesource.com/setup_18.x | sudo -E bash -
sudo apt install nodejs

node --version

4. Clone your project from Github

git clone https://github.com/piyushgargdev-01/short-url-nodejs

5. Install dependencies and test app

sudo npm i pm2 -g
pm2 start index

# Other pm2 commands
pm2 show app
pm2 status
pm2 restart app
pm2 stop app
pm2 logs (Show log stream)
pm2 flush (Clear logs)

# To make sure app starts when reboot
pm2 startup ubuntu

6. Setup Firewall

sudo ufw enable
sudo ufw status
sudo ufw allow ssh (Port 22)
sudo ufw allow http (Port 80)
sudo ufw allow https (Port 443)

7. Install NGINX and configure

sudo apt install nginx

cd /etc/nginx/sites-available/
touch yourdomain.com

Add the following code to the newly created file or the default file

server {
    server_name yourdomain.com www.yourdomain.com;

    location / {
        proxy_pass http://localhost:8001; #whatever port your app runs on
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Real-IP $remote_addr;

    }
}

# Check NGINX config
sudo nginx -t

# Restart NGINX
sudo systemctl restart nginx

OR

sudo nginx -s reload

Incase of additional subdomain and not default

Make sure the above code is inside the server block and Link the file

sudo ln -s /etc/nginx/sites-available/bot.adarshchakraborty.in /etc/nginx/sites-enabled/

8. Add SSL with LetsEncrypt

Install CertBot

sudo apt update
sudo apt install python3 python3-venv libaugeas0

Setup Python Environment

sudo python3 -m venv /opt/certbot/
sudo /opt/certbot/bin/pip install --upgrade pip

Install Certbot

sudo /opt/certbot/bin/pip install certbot certbot-nginx

Prepare Certbot Command

sudo ln -s /opt/certbot/bin/certbot /usr/bin/certbot

Choose how you'd like to run certbot

sudo certbot --nginx

OR

sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com