Add Dockerfile for OWASP ZAP tool

[ManishSihag]

🎯 Summary

PIMS-2011

Added Dockerfile for OWASP ZAP scan job. Uses the official ZAP image with updated permissions

🔰 Checklist

• I have read and agree with the following checklist and am following the guidelines in our Code of Conduct document.

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation where required.
• I have tested my changes to the best of my ability.
• My changes generate no new warnings.