Move the install_docker.sh to common place (#349)

fix opea-project/GenAIExamples#1042

Author: yinghu5

guide/installation/install_docker.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+# Copyright (C) 2025 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+# Update the package index
+sudo apt-get -y update
+
+# Install prerequisites
+sudo apt-get -y install ca-certificates curl
+
+# Create the directory for the Docker GPG key
+sudo install -m 0755 -d /etc/apt/keyrings
+
+# Add Docker's official GPG key
+sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
+
+# Set permissions for the GPG key
+sudo chmod a+r /etc/apt/keyrings/docker.asc
+
+# Add Docker repository to the sources list
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
+  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+# Update the package index with Docker packages
+sudo apt-get -y update
+
+# Install Docker packages
+sudo apt-get -y install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+
+# add existing user
+sudo usermod -aG docker $USER
+
+# Optional: Verify that Docker is installed correctly
+sudo docker --version