Importing datasets to database

[attkauppi]

As an administrator I want to import an existing database.

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Acceptance Criteria

• An external database can be imported.

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Ready when:

• Feature is implemented according to the Acceptance Criteria and it works as intended
• Documentation regarding the feature is written
• Code follows the agreed styling
• Code is reviewed (by 2 individuals other than the coder)
• Feature is merged into main and is on stating
• Feature is in production