docs: update docker shield image src

[codfish]

Summary by CodeRabbit

• Documentation
  • Updated the README badge to reference the latest json-server image tag instead of a fixed version reference.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: dee987d7-af22-453c-9729-6a0550e5e368

📥 Commits

Reviewing files that changed from the base of the PR and between 9f403cc and 7d9f0ff.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

README.md badge updated: the json-server Docker image tag was changed from 1.0.0-beta.12 to latest. This is a documentation-only change with no code or configuration modifications. (50 words max)

Changes

Cohort / File(s)	Summary
Documentation Badge Update README.md	Replaced pinned 1.0.0-beta.12 json-server Docker image tag in README badge with the generic latest tag. No functional changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• feat: upgrade to v0.17.4 #129: README badge/image tag updates touching json-server Docker image references.

Poem

🐰 A badge hopped from old to new,
I swapped its tag, then gave a chew—
No code disturbed, just text refined,
A tiny hop, a tidy line. ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch codfish-patch-1

📝 Coding Plan

• Generate coding plan for human review comments

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[github-actions]

🚀 PR build published. Run docker run -p 3000:3000 codfish/json-server@sha256:aa8264fd15244fb1f3c2017f651443af472165428341934b8fd00fa6060c6234