Task#276 dockerfile best practices

[Piotr-K8i]

Changes in this Pull Request:

• wrap into one RUN statement
• add --no-cache for apk add statement

Mandatory checks:

• [ ] latest changes were fetched from the upstream branch before creating this PR (branch is up to date)
• [ ] changes were tested manually
• [ ] communication about interdependent changes has been sent to the team (if applicable)
• [ ] respective Jenkins jobs were referenced in additional context section of this PR

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This change is