Update PostgreSQL data volume path for v18

[mhlas7]

Postgres 18 creates subfolders under /var/lib/postgresql for each version e.g. 18, 19

Summary by CodeRabbit

• Documentation
  • Updated Docker Compose PostgreSQL service configuration to use the correct data storage path.

[coderabbitai]

Walkthrough

Updated the Docker Compose PostgreSQL service volume mapping in README.md from ./data:/var/lib/postgresql/data to ./data:/var/lib/postgresql. This changes the target container path where PostgreSQL data is persisted during Docker Compose setup.

Changes

Cohort / File(s)	Change Summary
Docker Compose Configuration README.md	Updated PostgreSQL service volume mount path from ./data:/var/lib/postgresql/data to ./data:/var/lib/postgresql

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A tiny tweak, so small and neat,
The Docker path now feels complete,
From data deep to shallower ground,
Where PostgreSQL's secrets are found! 🐇

Pre-merge checks and finishing touches

✅ 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 'Update PostgreSQL data volume path for v18' directly relates to the main change: updating the Docker Compose PostgreSQL volume mapping path in README.md for PostgreSQL version 18 compatibility.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between a1c38a1 and 5c5b102.

📒 Files selected for processing (1)

• README.md (1 hunks)

🔇 Additional comments (1)

README.md (1)

92-92: Verify backward compatibility with PostgreSQL 13‑17.

The change updates the mount path from /var/lib/postgresql/data to /var/lib/postgresql, which aligns with PostgreSQL 18's version-specific subdirectory structure. However, since the README advertises support for PostgreSQL 13–18 (line 53), clarification is needed: does this change maintain compatibility with PostgreSQL 13–17, which may still use the traditional /var/lib/postgresql/data structure?

Consider adding one of the following:

1. A migration note warning users upgrading from PostgreSQL <18 to v18.
2. Separate Docker Compose examples for different PostgreSQL versions.
3. An explicit note that this example is for PostgreSQL 18+ only.

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