Make the base docker-compose.yml strictly production-shaped — image: only, no
build: — so a production host can only ever pull, never accidentally build
(compose gives build precedence for `up --build`/`build`, which mixed the two
modes). Local builds move to an explicit, non-auto-loaded overlay.
Production: docker compose pull && docker compose up -d
Development: docker compose -f docker-compose.yml -f docker-compose.dev.yml up -d --build
Verified with `docker compose config`: base renders image-only (no build) for
both services; the dev overlay adds build back (app -> Dockerfile,
bot -> bot/Dockerfile). README quick-start updated to the two-file flow.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0114TpmrNW4wNXsHq5CR72jQ
