Add GitHub Actions workflow for Node.js CI #1

	name: Node.js CI - OOP Portfolio

	on:
	push:
	branches: ["main", "development"]
	pull_request:
	branches: ["main", "development"]

	jobs:
	build:
	runs-on: ubuntu-latest

	strategy:
	matrix:
	node-version: [20.x]

	steps:
	- uses: actions/checkout@v4

	# Cache server dependencies
	- name: Cache server dependencies
	uses: actions/cache@v3
	with:
	path: server/node_modules
	key: server-node-modules-${{ runner.os }}-${{ matrix.node-version }}-${{ hashFiles('server/package.json') }}

	# Set up Node.js for the server
	- name: Setup Node.js for server
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}

	# Install server dependencies
	- name: Install server dependencies
	run: \|
	cd server
	yarn install

	# TypeScript check for server
	- name: TypeScript Check (Server)
	run: \|
	cd server
	yarn tsc --noEmit

	# Cache client dependencies
	- name: Cache client dependencies
	uses: actions/cache@v3
	with:
	path: client/node_modules
	key: client-node-modules-${{ runner.os }}-${{ matrix.node-version }}-${{ hashFiles('client/package.json') }}

	# Set up Node.js for client
	- name: Setup Node.js for client
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}

	# Install client dependencies
	- name: Install client dependencies
	run: \|
	cd client
	yarn install

	# TypeScript check for client
	- name: TypeScript Check (Client)
	run: \|
	cd client
	yarn tsc --noEmit

	# Build check
	- name: Build Check
	run: \|
	cd client
	yarn build

Provide feedback