Add GitHub Actions workflow documentation #3

	name: CI

	on:
	push:
	branches: [ main, feature/** ]
	pull_request:
	branches: [ main ]

	jobs:
	build:
	name: Build and Test
	runs-on: ubuntu-latest

	strategy:
	matrix:
	node-version: [18.x, 20.x]

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Setup Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}
	cache: 'npm'
	cache-dependency-path: app/package-lock.json

	- name: Install dependencies
	working-directory: ./app
	run: npm ci

	- name: Build backend
	working-directory: ./app
	run: npm run build --workspace=backend

	- name: Build frontend
	working-directory: ./app
	run: npm run build --workspace=frontend

	- name: Verify build artifacts
	working-directory: ./app
	run: \|
	echo "Checking backend build artifacts..."
	test -d backend/dist \|\| (echo "Backend dist directory not found" && exit 1)
	test -f backend/dist/server.js \|\| (echo "Backend server.js not found" && exit 1)
	test -f backend/dist/discount-rules.js \|\| (echo "Backend discount-rules.js not found" && exit 1)

	echo "Checking frontend build artifacts..."
	test -d frontend/dist \|\| (echo "Frontend dist directory not found" && exit 1)
	test -f frontend/dist/index.html \|\| (echo "Frontend index.html not found" && exit 1)

	echo "✅ All build artifacts verified successfully"

	- name: Upload build artifacts
	uses: actions/upload-artifact@v4
	with:
	name: build-artifacts-node-${{ matrix.node-version }}
	path: \|
	app/backend/dist/
	app/frontend/dist/
	retention-days: 7

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