Pineapple Poke Cake with Pineapple Glaze

unsalted butter (1 stick), melted

large eggs

granulated sugar

vanilla extract

all-purpose flour

salt, or to taste

baking soda

crushed pineapple, drained very well with juice reserved

about 2 cups confectioners’ sugar

to 4 tablespoons pineapple juice, or as needed for consistency