Replace AE_APP_BUILD_MODE=staging references and old docker compose
build-ui instructions with current build-docker-* and deploy-remote-*
Makefile targets.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Traffic diagram corrected: both app and api route through ae_web_dev
- Removed outdated 'two options' scaling section for ae_app
- Added port reference table to CHEATSHEET
- Scaling section simplified: change replicas, done, home nginx never changes
- localhost link corrected from 3001 to 8888 (LAN HTTP via ae_web_dev)
