[Security] Remedy vulnerabilities

[TomerShor]

Introduce fixes to remedy some vulnerabilities found by Snyk:

• Replace "github.com/disintegration/imaging" with "github.com/anthonynsimon/bild", and modify the image function example accordingly.
• Bump some packages
• Sanitize paths in a python script to avoid path traversal
• Escape regex expressions
• Avoid insecure TLS communication by making it configurable
• Sanitize invocation result data before returning it to the caller

[liranbg]

Very well. Minor one