# HTML Render Service Environment Variables API_KEY="your-api-key" # Service configuration NODE_ENV=development PORT=3000 # Security settings REQUEST_TIMEOUT_MS=30000 RATE_LIMIT_MAX=60 RATE_LIMIT_WINDOW_MS=60000 # OpenTelemetry using @elastic/opentelemetry-node OTEL_EXPORTER_OTLP_ENDPOINT="...your-OTLP/collector-endpoint..." OTEL_EXPORTER_OTLP_HEADERS="Authorization=..." OTEL_SERVICE_NAME="my-app"