Apt Get Install Pin Version Not Defined @ /build-environment/Dockerfile

[nleach999]

Checkmarx (IaC-Security): Apt Get Install Pin Version Not Defined
Checkmarx Project: checkmarx-ts/cx-supply-chain-toolkit
Repository URL: https://github.com/checkmarx-ts/cx-supply-chain-toolkit
Branch: master
Scan ID: 1d2e98e3-6db0-4376-8620-c9ac41d3ec76

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When installing a package, its pin version should be defined

Locations:

Result 1:
Severity: MEDIUM
State: TO_VERIFY
Status: RECURRENT
    File: /build-environment/Dockerfile[103,0]
    Expected value: Package 'adduser' has version defined
    Actual value: Package 'adduser' does not have version defined
    Review result in Checkmarx One: Apt Get Install Pin Version Not Defined