BeforeUp 0.3.0 preview 1

A focused preview update informed by recurring Docker Compose troubleshooting questions.

BeforeUp compare now:

• Detects changed values of explicitly declared container environment settings versus the running container, without printing setting names or values.
• Warns when a proposed image reference differs from the running container's reference. This does not check remote digests.
• Reports running services missing from the proposed resolved Compose configuration, without assuming Docker will delete them.
• Explicitly reports missing runtime metadata instead of claiming a healthy comparison.
• Keeps the previous port ownership, bind-mount and published-port change checks.

The new docs/common-issues.md explains common failures and native Docker workarounds first, and when BeforeUp provides extra evidence.

Tests: 31 Go regressions including Docker Compose integration and race checks, plus 14 reproducible synthetic Compose cases. Read-only checks against existing Linux services were performed. No external user adoption or product superiority is claimed.

Binaries are available for Linux amd64 and arm64 with SHA-256 checksums. BeforeUp does not start containers, modify configuration, pull images or change Docker services.