Resolve Issues #255 and #256, Update GraalVM to 21.0.2, and Update Documentation

[kijuky]

Description:

This merge request aims to resolve issues #255 and #256. Additionally, it updates the GraalVM version used for native-image to 21.0.2. It also switches outdated options in GraalVM to newer ones. Moreover, this request includes updates to the documentation. It corrects some outdated sbt command syntax.

Changes:

• Resolves issues #255 and #256.
• Updates GraalVM to version 21.0.2.
• Switches outdated options in GraalVM to newer equivalents.
• Updates documentation to correct outdated sbt command syntax.

  Additional Notes:

• This merge request aims to improve compatibility and maintainability of the project.
• Please review the changes thoroughly before merging.

[CLAassistant]

All committers have signed the CLA.