Add DevSecOps-2649 demo page with intentional vulnerabilities for GHAS showcase · githubabcs-devops/gh-advsec-devsecops@e02cdd9

Converting null literal or possible null value to non-nullable type.

Possible null reference assignment.

Converting null literal or possible null value to non-nullable type.

Possible null reference assignment.

Converting null literal or possible null value to non-nullable type.

Possible null reference assignment.

Converting null literal or possible null value to non-nullable type.

Possible null reference assignment.

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