[Blocker] fix: load dotenv only in dev, add NODE_ENV=production for Coolify

## GitHub Update **Repository:** [MKWcorp/threads-llm-publisher](https://github.com/MKWcorp/threads-llm-publisher) **Author:** MKWcorp **Date:** 4/20/2026, 6:01:12 AM **Commit:** [`6efed2f`](https://github.com/MKWcorp/threads-llm-publisher/commit/6efed2f90cea9270615e6240438ecb3bb48499ae) ### Commit Message fix: load dotenv only in dev, add NODE_ENV=production for Coolify --- _This story was imported from historical commits._