refactor: clean repository structure for v0.1.0 open source release

- Remove Go artifacts (cmd/, internal/, pkg/, go.mod)
- Move furt-lua/* content to repository root
- Restructure as clean src/, config/, scripts/, tests/ layout
- Rewrite README.md as practical tool documentation
- Remove timeline references and marketing language
- Clean .gitignore from Go-era artifacts
- Update config/server.lua with example.org defaults
- Add .env.production to .gitignore for security

Repository now ready for open source distribution with minimal,
focused structure and generic configuration templates.
close issue DAW/furt#86

.env.production

@@ -0,0 +1,50 @@
+# furt-lua/.env.production
+# Production Environment Configuration Template
+
+# =====================================
+# API KEYS (CHANGE THESE!)
+# =====================================
+# Generate secure keys: openssl rand -hex 32
+HUGO_API_KEY=daw-hugo-$(openssl rand -hex 16)
+ADMIN_API_KEY=daw-admin-$(openssl rand -hex 16)
+MONITORING_API_KEY=daw-monitor-$(openssl rand -hex 16)
+
+# =====================================
+# SMTP CONFIGURATION
+# =====================================
+SMTP_HOST=mail.dragons-at-work.de
+SMTP_PORT=465
+SMTP_USERNAME=noreply@dragons-at-work.de
+SMTP_PASSWORD=your-secure-smtp-password-here
+SMTP_FROM=noreply@dragons-at-work.de
+SMTP_TO=michael@dragons-at-work.de
+
+# =====================================
+# CORS CONFIGURATION (Production Domains)
+# =====================================
+CORS_ALLOWED_ORIGINS=https://dragons-at-work.de,https://www.dragons-at-work.de
+
+# =====================================
+# GATEWAY CONFIGURATION
+# =====================================
+GATEWAY_HOST=127.0.0.1
+GATEWAY_PORT=8080
+GATEWAY_LOG_LEVEL=warn
+
+# =====================================
+# SECURITY SETTINGS
+# =====================================
+# Test endpoint (disable in production)
+ENABLE_TEST_ENDPOINT=false
+
+# Rate limiting (production values)
+RATE_LIMIT_API_KEY_MAX=60
+RATE_LIMIT_IP_MAX=100
+RATE_LIMIT_WINDOW=3600
+
+# =====================================
+# DEVELOPMENT SETTINGS (Remove in production)
+# =====================================
+# DEBUG=false
+# LOG_REQUESTS=false
+