add yarn installation to install script

install.sh

@@ -7,5 +7,44 @@ cd "${script_dir}"
 
 echo "Docs directory: $script_dir"
 cd docs_website
+
+# Function to check if yarn is installed
+is_yarn_installed() {
+    if command -v yarn &> /dev/null; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+# Update and install prerequisites
+sudo apt update
+sudo apt install -y curl gnupg
+
+# Check if yarn is installed
+if is_yarn_installed; then
+    echo "Yarn is already installed."
+else
+    echo "Yarn is not installed. Installing yarn..."
+
+    # Add Yarn GPG key and repository
+    curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+    echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+
+    # Update and install yarn
+    sudo apt update
+    sudo apt install -y yarn
+
+    # Verify installation
+    if is_yarn_installed; then
+        echo "Yarn successfully installed!"
+    else
+        echo "Yarn installation failed."
+    fi
+fi
+
+
+
+
 yarn