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Infrastructure Layer
The infrastructure layer makes other layers work: It implements the repository interfaces (using Entity Framework Core for example) to actually work with a real database. It may also include an integration to a vendor to send emails and so on. This is not a strict layer below all layers but actually supports other layers by implementing the abstract concepts of them.
The Complete Figma is here
https://www.figma.com/file/LjhvtWHouIhugPPWWsonJG/Dinesuite-Architecture?type=design&mode=design