Build: use Yarn 4 via Corepack; immutable install with inline builds.
Runtime: enable Corepack as user 'node', use project-local cache (/app/.yarn/cache), add curl; fix ownership.
Entrypoint: generate keys in correct dir; run 'yarn install --immutable --inline-builds' before migrations; wait for Postgres.
Config: enable matomo/css/desktop; notify 'docker compose build' on entrypoint changes.
Docs: rename README title to 'Chess'.
Ref: ChatGPT conversation (2025-09-03) — https://chatgpt.com/share/68b88126-7a6c-800f-acae-ae61ed577f46
- Added network subnet (192.168.103.192/28) and port 8050 for web-app-chess
- Replaced stub README with usability-focused description of castling.club
- Implemented config, vars, meta, and tasks for web-app-chess
- Added Dockerfile, docker-compose.yml, env, and docker-entrypoint.sh templates
- Integrated entrypoint asset placement
- Updated meta to reflect usability and software features
Ref: https://chatgpt.com/share/68b6c65a-3de8-800f-86b2-a110920cd50e