Deploy Nodejs app on Digital Ocean

1. Sign up for Digital Ocean

2. Create a droplet and log in via ssh

Don`t have ssh key pairs just do this in your terminal

Generating public/private rsa key pair. Enter file in which to save the key (/Users/USER/.ssh/id_rsa):
Enter passphrase (empty for no passphrase): 
Enter same passphrase again:
cat ~/.ssh/

creating a new user and adding them to sudo group then switching to the new user

adduser newuserusermod -aG sudo newusersu - newuser
sudo adduser newusersudo usermod -aG sudo newusersu - newuser

3. Install Node/NPM

curl -sL | sudo -E bash -

sudo apt install nodejs

node --version

4. Clone your project from GitHub

git clone yourproject.git

5. Install dependencies and test app

cd yourproject
npm install
npm start (when you have a start script in your package.json or whatever your start command)
# stop app

6. Setup PM2 process manager to keep your app running

sudo npm i pm2 -g
pm2 start app (or whatever your file name)
# 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

You should now be able to access your app using your IP and port. Now we want to setup a firewall blocking that port and setup NGINX as a reverse proxy so we can access it directly using port 80 (http)

7. Setup ufw 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)

8. Install NGINX and configure

sudo apt install nginxsudo nano /etc/nginx/sites-available/default
server_name;    location / {
proxy_pass http://localhost:3000; #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;
# Check NGINX config
sudo nginx -t
# Restart NGINX
sudo service nginx restart

You should now be able to visit your IP with no port (port 80) and see your app. Now let’s add a domain so as to access our app via the domain name because as at now we cannot access our app via the domain name

9. Add domain in Digital Ocean

Register and/or setup domain from registrar

  1. Add SSL with LetsEncrypt
  2. This will work well with Ubuntu version 18 i found out the hard way
sudo add-apt-repository ppa:certbot/certbot
sudo apt-get update
sudo apt-get install python-certbot-nginx
sudo certbot --nginx -d -d
# Only valid for 90 days, test the renewal process with
certbot renew --dry-run



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