feat: add Docker support with multi-stage build and compose config

[jrafflenbeul]

Summary

• Add multi-stage Dockerfile
• Add docker-compose.yml with persistent volumes for vault, audit, and tree indices
• Add Docker-optimized config (cloakpipe.docker.toml) with 0.0.0.0 binding
• Add .dockerignore to keep build context lean

Deploy

Create .env in root directory. Add environment variables:

# Set secrets in .env
echo "OPENAI_API_KEY=sk-..." > .env
echo "CLOAKPIPE_VAULT_KEY=$(openssl rand -hex 32)" >> .env

Run

docker compose up -d