feature: updates to trivy code scanner

[itsmostafa]

Fix Trivy to properly scan the backend code and deps

🗣 Description

💭 Motivation and context

🧪 Testing

tested on GH Actions

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All new and existing tests pass.

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