fix: enhance CA certificate handling in entrypoint script

[pratapaprasanna]

Updated the entrypoint script to improve the detection and processing of custom CA certificates. The script now correctly identifies both regular files and symbolic links with a '.crt' extension, ensuring that all relevant certificates are included in the keystore. This change enhances the robustness of the CA certificate setup process.

Description

[!TIP]
Add a TL;DR when the description is longer than 500 words or extremely technical (helps the content, marketing, and DevRel team).

Please also include relevant motivation and context. List any dependencies that are required for this change. Add links to Notion, Figma or any other documents that might be relevant to the PR.

Fixes #Issue Number
or
Fixes Issue URL

[!WARNING]
If no issue exists, please create an issue first, and check with the maintainers if the issue is valid.

Automation

/ok-to-test tags=""

:mag: Cypress test results

[!CAUTION]
If you modify the content in this section, you are likely to disrupt the CI result for your PR.

Communication

Should the DevRel and Marketing teams inform users about this change?

• [ ] Yes
• [ ] No

Summary by CodeRabbit

• Bug Fixes
  • Improved detection and import of custom CA certificates by including support for symbolic links, ensuring all relevant .crt files are recognized and imported.