docs: update user for postgres healthcheck

[poiintt]

The user prisma does not exist in postgres for this docker-compose.
The healtcheck command results in FATAL: role "prisma" does not exist-Logs.
This PR changes the user in the healtcheck command to the correct user postgres, which is configured in the env POSTGRES_USER (line 224)

Summary by CodeRabbit

• Documentation
  • Corrected PostgreSQL Docker Compose healthcheck configuration in the deployment guide to use the correct database user credentials, ensuring readiness probes validate against the properly configured user.

[vercel]

@poiintt is attempting to deploy a commit to the Prisma Team on Vercel.

A member of the Team first needs to authorize it.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 6268fe9a-3d95-4a6c-888e-282a8e2db93b

📥 Commits

Reviewing files that changed from the base of the PR and between 9bcb676 and 52fadfe.

📒 Files selected for processing (1)

• apps/docs/content/docs/guides/deployment/docker.mdx

---

Walkthrough

A single line correction to a Docker Compose configuration example in the deployment guide. The PostgreSQL healthcheck command now uses the correct username (postgres) that matches the configured POSTGRES_USER environment variable, replacing an incorrect reference to a non-existent prisma user.

Changes

Cohort / File(s)	Summary
Docker Deployment Guide apps/docs/content/docs/guides/deployment/docker.mdx	Updated PostgreSQL healthcheck command to use the correct username (postgres) instead of the non-existent prisma user, ensuring the readiness probe aligns with the actual service configuration.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 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 directly and accurately describes the main change: updating the PostgreSQL healthcheck username from 'prisma' to 'postgres' in the Docker documentation.
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.}

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}