Used "Threshold" to find the darkest point visible in the photo and the brightest point visible in the picture and noted the values and locations.
Created a curves adjustment layer
Double clicked on the black dropper and set the values to what I found in threshold (6), then clicked on the darkest point in the picture.
Then double clicked on the white dropper and set the values to what I found in threshold (248), then clicked on the brightest point in the picture.
Then clicked OK.
This is just an edit of the posted JPG.