Move RESEND_API_KEY and Listmonk credentials to .env file
on the server. No secrets should be committed to the repo.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
n8n community edition doesn't have Settings > Variables.
Pass TWENTY_API_KEY and RESEND_API_KEY as container
environment variables instead, accessible via $env.* in workflows.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>