.env.example

# Database
DATABASE_URL="postgresql://username:password@localhost:5432/hello_world"

# Authentication
JWT_SECRET="your-super-secret-jwt-key-here"

# Stripe (for payments)
STRIPE_SECRET_KEY="sk_test_..."
STRIPE_PUBLISHABLE_KEY="pk_test_..."
STRIPE_WEBHOOK_SECRET="whsec_..."

# External APIs
COINGECKO_API_KEY="your-coingecko-api-key"
COINMARKETCAP_API_KEY="your-coinmarketcap-api-key"

# Email (for notifications)
SMTP_HOST="smtp.gmail.com"
SMTP_PORT="587"
SMTP_USER="your-email@gmail.com"
SMTP_PASS="your-app-password"

# File Upload (AWS S3 or similar)
AWS_ACCESS_KEY_ID="your-aws-access-key"
AWS_SECRET_ACCESS_KEY="your-aws-secret-key"
AWS_REGION="us-east-1"
AWS_S3_BUCKET="hello-world-uploads"

# Redis (for caching)
REDIS_URL="redis://localhost:6379"

# App Configuration
NEXT_PUBLIC_APP_URL="http://localhost:3000"
NODE_ENV="development"

# CORS allowed origins for each environment (comma-separated)
CORS_ALLOWED_ORIGINS_DEV=http://localhost:3000
CORS_ALLOWED_ORIGINS_STAGING=https://staging.example.com
CORS_ALLOWED_ORIGINS_PROD=https://yourdomain.com,https://app.yourdomain.com