add install_node.sh via nvm

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

install_node.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+set -euo pipefail
+
+NVM_VERSION="v0.40.4"
+NVM_INSTALL_URL="https://raw.githubusercontent.com/nvm-sh/nvm/${NVM_VERSION}/install.sh"
+
+echo "============================================"
+echo "Node.js Installation Script (via nvm)"
+echo "============================================"
+echo ""
+echo "This script will:"
+echo "  - Install nvm ${NVM_VERSION} to ~/.nvm"
+echo "  - Install the latest LTS version of Node.js"
+echo ""
+read -p "Continue with installation? (y/N) " -n 1 -r
+echo
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+    echo "Installation cancelled."
+    exit 0
+fi
+
+echo ""
+echo "Installing nvm..."
+curl -o- "$NVM_INSTALL_URL" | bash
+
+export NVM_DIR="$HOME/.nvm"
+[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+
+echo ""
+echo "Installing latest LTS Node.js..."
+nvm install --lts
+nvm use --lts
+
+echo ""
+echo "============================================"
+echo "Node.js installed successfully!"
+node --version
+npm --version
+echo ""
+echo "nvm and node are installed. Make sure your .bashrc_paths includes:"
+echo '  export NVM_DIR="$HOME/.nvm"'
+echo '  [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"'
+echo "============================================"