Combine the chocolate chips and coconut oil in a medium bowl, and melt in the microwave at 20-second increments, stirring well each time. Once the chocolate has melted, add the hazelnuts and stir well, so they’re well covered in chocolate. Transfer them to the lined baking sheet, sprinkle with salt and place the freezer for 1 to 2 hours, until the chocolate hardens. Break it into pieces