It's a pretty straight-forward question - How does one apply a border effect to only the wanted edges of an Image with SwiftUI?

For example, I only want to apply a border to the top and bottom edges of an image because the image is taking up the entire width of the screen.

Image(mission.missionImageString)
    .resizable()
    .aspectRatio(contentMode: .fit)
    .border(Color.white, width: 2) //Adds a border to all 4 edges

Any help is appreciated!