v0.0.4

What's Changed

• Add a Dockerfile for broker by @awlx in #54
• Use bazel for builds by @awlx in #56
• • Use logging instead of print() by @rucarrol-goog in #55
• worker: use get_attr and prevent TypeError by @moepman in #57
• Fixup domain prefix by @rucarrol-goog in #58
• move domain_prefix from MQTT to root in config. by @rucarrol-goog in #59
• Add configurable log_level by @awlx in #61

Full Changelog: v0.0.3...v0.0.4