Preserve backup_old_docker bot variant at root (for comparison)

Snapshot of the dockerisation-era bot code laid out at the repository
root so it can be diffed directly against the working-copy baseline
(restructure/working-copy-root) to see how the variant differed:

- thin_client.py asyncio entrypoint (vs working_copy bot.py)
- constants.py env-var/credential refactor, communication auth, etc.
- extra gpt_interface/ service, sync.py, watch_script_params.py
- conanjurer_* modules absent in this variant

Docker infrastructure (docker/, docker-compose.yml, .dockerignore)
intentionally omitted - this branch is for code comparison only and is
not intended to be merged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -1,2 +1,23 @@
 # conjurer
 Discord.py bot for fun, sex and BDSM
+
+## Docker quick start
+
+Docker definitions live at the repository root and let you run the Discord bot
+(`thin_client.py`), the musician file service, and the librarian search worker as
+separate containers.
+
+1. **Prepare configuration**
+   - Edit the environment files under `docker/env/*.env` and replace the
+     placeholders (`replace-me`, `shared-secret`, etc.) with your real tokens.
+     Keep `CONJURER_API_KEY` identical across all services.
+2. **Create host directories** listed in `docker-compose.yml` (for example
+   `docker/volumes/bot/config`, `docker/volumes/musician/data`, …) and populate
+   them with the required JSON settings or media assets.
+3. **Launch the stack**
+   ```bash
+   docker compose up --build
+   ```
+
+Logs for each container are mounted under `docker/volumes/*` so you can diff the
+runtime JSON and log files in git if needed.