Improve README formatting and clarity #29

	name: CI

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	build-and-validate:
	runs-on: ubuntu-latest

	steps:
	- name: Check out repository
	uses: actions/checkout@v4

	- name: Set up Node
	uses: actions/setup-node@v4
	with:
	node-version: 22
	cache: npm

	- name: Set up Java
	uses: actions/setup-java@v4
	with:
	distribution: temurin
	java-version: 21

	- name: Install dependencies
	run: npm ci

	- name: Validate Firebase rules JSON
	run: npm run validate:rules:json

	- name: Validate Firebase rules syntax and smoke test
	# Validates firebase-rules.json syntax and runs behavioral smoke tests against
	# the Firebase Database Emulator. This does NOT deploy the rules to the live
	# Firebase project. After merging changes to firebase-rules.json, deploy manually:
	# npx firebase-tools deploy --only database --project YOUR_PROJECT_ID
	# Automating deployment here would require a Firebase service-account secret in
	# GitHub Actions — see README Step 7 for instructions.
	run: npm run validate:rules

	- name: Build app
	run: npm run build

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