How to do a hard refresh on images

I’ve got an app that is very image centric and some of the images are being changed on the web server backend regularly. So for example, an image ‘12345.png’, will have it’s content regularly changed but maintain it’s filename and location. The issue I have is ionic seems to keep the image cached. In a web browser, I do a hard refresh and it will update to the newest version of the image. How do I do that within ionic?