Docker - Configure a clean Ubuntu Server instance to deploy Rails apps using Kamal

aws-ubuntu-server-ec2-instance-setup-for-rails-docker-kamal-deployment.sh

#!/bin/bash

sudo adduser --disabled-password docker
sudo chmod 755 /home/docker
sudo usermod -aG docker ${USER}

sudo apt-get update -y
sudo apt-get upgrade -y

sudo apt-get install -y ufw
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw allow http
sudo ufw allow https
sudo ufw enable

sudo apt-get install -y fail2ban
sudo systemctl enable fail2ban
sudo systemctl start fail2ban

/usr/bin/env curl -fsSL https://get.docker.com | sh

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

sudo systemctl enable docker

sudo apt install -y nginx certbot python3-certbot-nginx

mkdir -p /letsencrypt &&
  touch /letsencrypt/acme.json &&
  chmod 600 /letsencrypt/acme.json
  
docker network create --driver bridge private

sudo apt get install -y bat btop lsd