Add environment validation and template files for start-all-phases.sh

[Copilot]

The startup script failed silently or with unclear errors when .env files were missing, blocking first-time setup.

Changes

Environment Templates

• Added server/.env.example and mini-app/.env.example with annotated configuration options
• Templates include World ID credentials, RPC endpoints, and contract addresses

Configuration Validation

• New --check flag validates setup without starting services
• Enhanced check_environment() to provide actionable setup commands when .env files missing
• Script now references .env.example files in error messages

Documentation

• Updated README.md and QUICK_START.md with configuration validation workflow

Usage

# Validate configuration before starting
bash start-all-phases.sh --check

# Script shows exact commands when .env missing:
# cp server/.env.example server/.env
# cp mini-app/.env.example mini-app/.env

# Start all phases after configuration
bash start-all-phases.sh --all

Original prompt

start all phase

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.