fix: regex vulnerable to super-linear runtime

[sjinks]

Description

• The regular expression used to parse DOCKER_HOST is vulnerable to super-linear runtime due to backtracking; in theory (although unlikely), it can be exploited to cause a denial of service (ref)
• The regular expression used to extract the version of a PHP image is vulnerable to super-linear runtime due to backtracking (ref)

Pull request checklist

• Update SETUP.md with any new environmental variables.
• Update the documentation.
• Manually test the relevant changes.
• Follow the pull request checklist
• Add/update automated tests as needed.

New release checklist

• Automated tests pass.
• The Preparing for release checklist is completed.

Steps to Test

The existing tests cover the change.

[sonarqubecloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

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