Add healthcheck to container

[hamishfagg]

Description

Please include a summary of the change and the issue it solves.

Fixes #issue_number

Type of change

(Please delete options that are not relevant)

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ⚡ New feature (non-breaking change which adds functionality)
• 📢 Breaking change (fix or feature that would cause existing functionality not to work as expected)
• 📄 This change requires a documentation update

Verification Process

To ensure the changes are working as expected:

• Test Location: Specify the URL or path for testing.
• Verification Steps: Outline the steps or queries needed to validate the change. Include any data, configurations, or actions required to reproduce or see the new functionality.

Additional Media:

• I have attached a brief loom video or screenshots showcasing the new functionality or change.

Checklist:

• My code follows the style guidelines(PEP 8) of MindsDB.
• I have appropriately commented on my code, especially in complex areas.
• Necessary documentation updates are either made or tracked in issues.
• Relevant unit and integration tests are updated or added.

[entelligence-ai-pr-reviews]

Entelligence AI Vulnerability Scanner

Status: No security vulnerabilities found

Your code passed our comprehensive security analysis.

[martyna-mindsdb]

@hamishfagg
What's the status here? Can this be closed/merged?

[Copilot]

Pull request overview

Adds a Docker container healthcheck for MindsDB so orchestrators (Docker, Compose, Kubernetes via Docker runtime) can detect when the service is unhealthy.

Changes:

• Adds a HEALTHCHECK to docker/mindsdb.Dockerfile that polls http://localhost:47334/api/status.
• Leaves the healthcheck inherited by downstream stages (dev and the final extras-based image).

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[martyna-mindsdb]

@hamishfagg @lucas-koontz
Can we retarget this PR to the releases/26.1.0 branch please?