Publish (dist-tag:latest)

Tracing support and structured logging support via flags (apollograph…

…ql#215)

- Traces show up in Jaeger with #[instrument] or span! Logs show up normally in stdout. Add README to explain how to set up.
- Structured logging as a flag + OT reporting to Jaeger.
- Batch exporting traces | version updates | UDP support | tracing flag | configure tracing url

- [x] add metrics
- [ ] configure sample rate
- [ ] B3 propagation

Added apollographql#229 for follow ups.

Publish stargate with appropriately versioned tags (apollographql#197)

Bind gateway to address 0.0.0.0 (expose to all interfaces) (apollogra…

…phql#214)

Structured logging as a flag + OT reporting to Jaeger.

Update stargate/Dockerfile

Update stargate/Dockerfile

Update stargate/Dockerfile