Tracking issue: Developer Experience

This is a tracking issue for some simple project improvements.

### GitHub Actions

- [x] Basic CI (run test on PR) - https://github.com/docker/go-events/pull/33
- [ ] Add DCO check
- [x] Add static analysis - https://github.com/docker/go-events/pull/35
- [x] Add security analysis workflow - https://github.com/docker/go-events/pull/37

### Local development

- [ ] Add devcontainer configuration
