feat: enhance user authentication process with additional validation and error handling

Author: tekjar

install_docker.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -ex
+
+# Use default username if no argument is provided
+username="${1:-ubuntu}"
+
+sudo apt-get update
+sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+sudo apt-get update
+sudo apt-get install -y docker-ce
+sudo systemctl start docker
+sudo systemctl enable docker
+sudo usermod -aG docker "$username"