Add demo video link (YouTube) to README #7

	name: CI

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	# Cancel superseded runs on the same ref.
	concurrency:
	group: ci-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	backend:
	name: Backend · tests (Python ${{ matrix.python-version }})
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: ["3.11", "3.12"]
	defaults:
	run:
	working-directory: backend
	env:
	DEMO_MODE: "true"
	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: pip
	cache-dependency-path: backend/requirements.txt

	- name: Install dependencies
	run: pip install -r requirements.txt

	- name: Run pipeline test suite
	run: python -m pytest

	frontend:
	name: Frontend · build
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: frontend
	steps:
	- uses: actions/checkout@v4

	- name: Set up Node
	uses: actions/setup-node@v4
	with:
	node-version: "20"
	cache: npm
	cache-dependency-path: frontend/package-lock.json

	- name: Install dependencies
	run: npm ci

	- name: Build production bundle
	run: npm run build

Provide feedback