# SQ-024: Docker Compose & E2E Example

**Status:** `[x] DONE`
**Blocked by:** SQ-023
**Priority:** Low

## Description

Docker Compose setup for running a 3-node SQ cluster with MinIO, plus an example publish/subscribe program.

## Files to Create/Modify

- `templates/docker-compose.yaml` - 3 sq-server instances + MinIO
- `templates/sq-server.Dockerfile` - multi-stage build
- `examples/publish_subscribe/Cargo.toml`
- `examples/publish_subscribe/src/main.rs`
- `scripts/grpc.sh` - grpcurl testing helper

## Docker Compose Services

- `minio` - S3-compatible object storage
- `sq-1` - SQ node 1 (seeds: sq-2, sq-3)
- `sq-2` - SQ node 2 (seeds: sq-1, sq-3)
- `sq-3` - SQ node 3 (seeds: sq-1, sq-2)

## Acceptance Criteria

- [ ] `docker compose up` starts all 4 services
- [ ] All 3 SQ nodes discover each other (verify via Status RPC)
- [ ] Example program publishes and consumes messages successfully
- [ ] Kill one container, cluster continues operating
- [ ] Restart container, node catches up