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backend/.env.example

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+# Database Configuration
+# Use 'sqlite' or 'postgres'
+DB_TYPE=sqlite
+
+# For SQLite (relative or absolute path)
+DATABASE_URL=./data/spanglish.db
+
+# For PostgreSQL
+# DATABASE_URL=postgresql://user:password@localhost:5432/spanglish
+
+# JWT Secret (change in production!)
+JWT_SECRET=your-super-secret-key-change-in-production
+
+# Server Configuration
+PORT=3001
+API_URL=http://localhost:3001
+FRONTEND_URL=http://localhost:3002
+
+# Payment Providers (optional)
+STRIPE_SECRET_KEY=
+STRIPE_WEBHOOK_SECRET=
+MERCADOPAGO_ACCESS_TOKEN=
+
+# LNbits Configuration (for Bitcoin Lightning payments)
+# Get these from your LNbits instance
+# URL should be like: https://lnbits.yourdomain.com or https://legend.lnbits.com
+LNBITS_URL=
+# Invoice/Read key from your LNbits wallet
+LNBITS_API_KEY=
+# Optional: webhook secret for additional verification
+LNBITS_WEBHOOK_SECRET=
+
+# Email Service
+# Provider options: resend, smtp, console (console = log only, no actual email)
+EMAIL_PROVIDER=console
+EMAIL_FROM=
+EMAIL_FROM_NAME=
+
+# Resend Configuration (if EMAIL_PROVIDER=resend)
+# Get your API key from https://resend.com
+EMAIL_API_KEY=
+# Alternative env name also supported:
+# RESEND_API_KEY=
+
+# SMTP Configuration (if EMAIL_PROVIDER=smtp)
+# Works with any SMTP server: Gmail, SendGrid, Mailgun, Amazon SES, etc.
+SMTP_HOST=mail.spango.lat
+SMTP_PORT=465
+SMTP_USER=
+SMTP_PASS=
+# Set to true for port 465 (implicit TLS), false for port 587 (STARTTLS)
+SMTP_SECURE=true
+# Set to false to allow self-signed certificates (not recommended for production)
+SMTP_TLS_REJECT_UNAUTHORIZED=true
+
+# Common SMTP examples:
+# Gmail: SMTP_HOST=smtp.gmail.com, SMTP_PORT=587, use App Password for SMTP_PASS
+# SendGrid: SMTP_HOST=smtp.sendgrid.net, SMTP_PORT=587, SMTP_USER=apikey, SMTP_PASS=your_api_key
+# Mailgun: SMTP_HOST=smtp.mailgun.org, SMTP_PORT=587
+# Amazon SES: SMTP_HOST=email-smtp.us-east-1.amazonaws.com, SMTP_PORT=587