Images are getting displayed when they are deployed into Dev

I can even tell you the error code from here. :-)

 

The error code is 404, image not found. Please see the image link that you are using in your application, that is causing the problem.  

Sure, what is the error message? 

 

Open the console and see the error message that is being shown, we can guide you more once we get to know the error message about the image.