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    This article shows you the way to deploy an app generated by Amplication to DigitalOcean. Amplication provides the dockerfile to use containers for deployment, but this blog explains how to do it manually. I will guide you step by step to deploy Nestjs app and Postgres database with DOCKER, NGINX and PM2.

1. Sign up a Digital Ocean account

• Visit digitalocean.com and create an account
• If you are a student, go to https://education.github.com/pack/offers to get 100$ offer
• Add your credit card to start using awesome services

2. Create a droplet

• Click on "Create" button and select create droplet
• Config your droplet (CPU, region, ssh,...)
• Waiting for your machine initialization
• After finish loading, go to tab "Access", you will see a button to load the console.

3. Install Nodejs, NPM

sudo apt update
sudo apt install nodejs
sudo apt install npm

4. Install Docker

• Install HTTPS packages:

sudo apt install apt-transport-https ca-certificates curl software-properties-common

• Add the GPG key to your system:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

• Add repository to APT sources:

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"

• Install Docker:

sudo apt install docker-ce

• Finally, Install Docker Compose:

sudo curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

5. Clone project from your git repository

git clone https://github.com/<username>/<repo-name>.git

    If you don't see your code, please checkout this document on how to sync your code from Amplication to GitHub https://docs.amplication.com/docs/sync-with-github You can also use my repo for testing: https://github.com/thucpn/amplication-server-demo-deploy

6. Install dependencies and initialize database

• Go to server folder and install dependencies

cd <your-repo>/server
npm install

• Generate Prisma client

npm run prisma:generate

• Start database in Docker

npm run docker:db

• Initiate the database

npm run db:init

• Start the server

npm start

    Go to <droplet-ip-address>:3000 (example: 159.65.6.71:3000), you will see the response from server.

7. Setup PM2 to manage process

• Install PM2

sudo npm i pm2 -g

• Create an app

pm2 start dist/main.js --name myserver

    Your app is now running!

• View logs of app

pm2 logs myserver

8. Setup ufw firewall

sudo ufw enable
sudo ufw status
sudo ufw allow ssh
sudo ufw allow http
sudo ufw allow https

9. Setup NGINX as a reverse proxy

• Install nginx

sudo apt install nginx

• Open config file

sudo nano /etc/nginx/sites-available/default

• Add the following to location block

 location / {
        proxy_pass http://localhost:3000;
        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 correctly

sudo nginx -t

• Restart NGINX

sudo service nginx restart

    Visit <droplet-ip-address> (example: 159.65.6.71), you will see app running without port. That's awesome!

10. Here's my result

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• Blog Client demo for api: https://amplication-client-demo.vercel.app/

References:

    These are the sources that I have consulted:

    https://docs.amplication.com/docs/ https://pm2.keymetrics.io/docs/usage/process-management/ https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-18-04 https://www.digitalocean.com/community/tutorials/how-to-install-docker-compose-on-ubuntu-18-04 https://medium.com/swlh/deploy-nest-js-app-with-postgres-in-vps-e1ce4abd2cad https://gist.github.com/bradtraversy/cd90d1ed3c462fe3bddd11bf8953a896