fix(ci): resolve reusable docker workflow-file evaluation error

[LucasSantana-Dev]

Summary

• fix .github/workflows/reusable-docker-build.yml workflow-file failure on push
• root cause from run 22829586601: if expression referenced secrets.DOCKER_USERNAME, which is invalid in workflow expression evaluation
• switch guard to env-backed check and keep secret values in step env/with

Changes

• update Docker Hub login guard in reusable docker workflow
• add changelog entry for this CI fix
• add README maintenance note

Validation

• confirmed no secrets.* usage remains in if conditions for this workflow
• rendered workflow YAML successfully via gh workflow view reusable-docker-build.yml --yaml

Summary by CodeRabbit

• Bug Fixes

  • Fixed Docker Hub authentication in the CI/CD pipeline to prevent workflow execution errors.

• Documentation

  • Added CHANGELOG documenting repository changes using Keep a Changelog format.
  • Updated README with maintenance notes on CI/CD improvements.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 3a544c77-747e-4904-ae71-9df55f8996bd

📥 Commits

Reviewing files that changed from the base of the PR and between 6fbe56b and 979e05c.

📒 Files selected for processing (3)

• .github/workflows/reusable-docker-build.yml
• CHANGELOG.md
• README.md

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📝 Walkthrough

Walkthrough

The workflow configuration is refactored to use environment variables (DOCKER_USERNAME, DOCKER_PASSWORD) sourced from secrets instead of directly referencing secrets in conditional statements. This prevents workflow evaluation errors. Documentation files are added and updated to record this change.

Changes

Cohort / File(s)	Summary
Workflow Refactoring .github/workflows/reusable-docker-build.yml	Replaces direct secrets.* references in Docker Hub login conditional checks and steps with environment-backed env.DOCKER_USERNAME and env.DOCKER_PASSWORD variables sourced from secrets, preventing workflow evaluation errors.
Documentation CHANGELOG.md, README.md	Introduces CHANGELOG.md with Keep a Changelog format documenting the workflow fix in Unreleased → Fixed section. Updates README.md with a maintenance note describing the secrets reference fix.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• feat: Reusable publish-npm and docker-build workflows (Phase 3) #2: Directly modifies the same Docker Hub login if-conditions and steps in reusable-docker-build.yml, implementing the environment variable substitution pattern for credential access.

Poem

🐰 Hops with joy at secrets contained,
No more errors in workflows strained,
Environment variables take the lead,
Docker Hub credentials now flow with speed,
A bugfix done, the rabbit's creed! 🌟

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and accurately summarizes the main change: fixing a workflow-file evaluation error in the reusable Docker workflow by addressing invalid secrets context usage in if conditions.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/reusable-docker-secrets-if

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