Add install-docker script

install-docker/README.md

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+## Why?
+
+This script is a handy script to install Docker on Ubuntu or Debian. Also it checks for docker installed with snap and asks if you want to uninstall it.
+
+## How to use?
+
+```bash
+bash -c "$(wget -qLO - https://raw.githubusercontent.com/bigbeartechworld/big-bear-scripts/master/install-docker/run.sh)"
+```

install-docker/run.sh

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+#!/bin/bash
+
+# Function to ask for user confirmation
+confirm() {
+    while true; do
+        read -rp "$1 [y/n]: " yn
+        case $yn in
+            [Yy]*) return 0 ;;
+            [Nn]*) return 1 ;;
+            *) echo "Please answer yes or no." ;;
+        esac
+    done
+}
+
+# Check if Docker is installed via Snap
+if snap list docker &> /dev/null; then
+    echo "Docker is installed via Snap."
+    if confirm "Do you want to uninstall the Snap version of Docker?"; then
+        echo "Uninstalling Docker from Snap..."
+        sudo snap remove docker
+    else
+        echo "Skipping Docker uninstallation from Snap."
+    fi
+else
+    echo "Docker is not installed via Snap, or Snap is not installed."
+fi
+
+# Update package database
+echo "Updating package database..."
+sudo apt-get update
+
+# Install prerequisites
+echo "Installing prerequisites..."
+sudo apt-get install -y \
+     apt-transport-https \
+     ca-certificates \
+     curl \
+     gnupg \
+     lsb-release
+
+# Add Docker's official GPG key
+echo "Adding Docker's official GPG key..."
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
+
+# Set up the stable repository
+echo "Setting up Docker repository..."
+DISTRO=$(lsb_release -is | tr '[:upper:]' '[:lower:]')
+CODENAME=$(lsb_release -cs)
+echo \
+"deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/$DISTRO \
+$CODENAME stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+# Install Docker Engine
+echo "Installing Docker Engine..."
+sudo apt-get update
+sudo apt-get install -y docker-ce docker-ce-cli containerd.io
+
+# Verify Docker installation
+echo "Verifying Docker installation..."
+sudo docker run hello-world
+
+echo "Docker installation completed successfully!"