DDx v0.4.0

Changelog

🚀 Features

• add Hugo to Docker pipeline; website build now reproducible (Erik LaBianca)
• installation architecture redesign, version tracking, jq command, demo pipeline (Erik LaBianca)

🐛 Bug Fixes

• remove ineffectual i++ before i = len(args) in jq.go (ineffassign) (Erik LaBianca)
• suppress errcheck lint warnings on intentionally-ignored errors (Erik LaBianca)

Full Changelog: v0.3.0...v0.4.0