## Problem
The quickstart docker-compose file was recently moved to
\`docker/docker-compose.quickstart.yml\` during the Docker
reorganization but still have zero inline comments. When new user copy
this file for self-hosting, they see variables like:
- \`BETTER_AUTH_SECRET\` - what is this? How to generate?
- \`PAPERCLIP_DEPLOYMENT_MODE: "authenticated"\` - what other modes
available?
- \`PAPERCLIP_DEPLOYMENT_EXPOSURE: "private"\` - what does private vs
public mean?
- \`OPENAI_API_KEY\` and \`ANTHROPIC_API_KEY\` - both required? Or just
one?
They have to go read DOCKER.md or other docs to understand each
variable.
## What I changed
Added inline YAML comments directly in the file:
- Header block with step-by-step quickstart commands (cd docker, export,
docker compose up)
- Section headers grouping LLM keys, deployment settings, and secrets
- Comment explaining each non-obvious variable with valid values
- Note about \`BETTER_AUTH_SECRET\` with openssl generation command
- Comment on the volume explaining what data it persist
No functional change - only YAML comments added.
b287281940