docs: prefer Docker Hub image in README

[leonid-shevtsov]

What & why

Docker Hub (mailtrap/mailtrap-local) is the primary public image; docs and release copy still pointed at GHCR first.

• README Docker install uses mailtrap/mailtrap-local:latest (GHCR secondary)
• Goreleaser release footer Docker example uses Docker Hub
• Channel / changelog / CI comments list Docker Hub ahead of GHCR

How to test

• Confirm README, release footer, and channel comments show Docker Hub first
• Confirm GHCR still mentioned as a mirror / secondary publish target

Summary by CodeRabbit

• Documentation
  • Updated Docker installation examples to use the Docker Hub image.
  • Clarified that the image is also available through GitHub Container Registry.
  • Revised repository and release documentation to consistently list Docker Hub and GHCR.
  • Updated release notes with UI improvements, bug fixes, and distribution details for the 0.2.0 and 0.1.0 releases.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: f448fa68-7cd6-40b6-a09b-8e9aa7d25440

📥 Commits

Reviewing files that changed from the base of the PR and between dc70b40 and 182d958.

📒 Files selected for processing (5)

• .github/workflows/ci.yml
• .github/workflows/release.yml
• .goreleaser.yaml
• CHANGELOG.md
• README.md

🚧 Files skipped from review as they are similar to previous changes (1)

• README.md

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📝 Walkthrough

Walkthrough

Docker image references and release documentation now use Docker Hub as the primary documented image source while noting publication to GHCR.

Changes

Docker registry references

Layer / File(s)	Summary
Release registry metadata .goreleaser.yaml, .github/workflows/ci.yml, .github/workflows/release.yml	Release comments and the generated Docker command now list Docker Hub before GHCR and use the Docker Hub image reference.
Installation and distribution documentation README.md, CHANGELOG.md	Docker installation and distribution text now documents Docker Hub alongside GHCR.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• mailtrap/mailtrap-local#10: Adds the Docker CI job referenced by the updated image comment.
• mailtrap/mailtrap-local#44: Overlaps with the changelog updates for release notes and Goreleaser/Homebrew automation.

Suggested reviewers: sergeykorolev, piobeny

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly reflects the main doc change: preferring the Docker Hub image in README.
Description check	✅ Passed	The description covers motivation, changes, and test steps; only the optional Images and GIFs section is missing.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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