Make meaningful placeholders for missing images

Consider either replacing the placeholder image with something meaningful or/and allow users to upload their own images as placeholders (via site configuration).

Following the feedback on Reddit

https://www.reddit.com/r/directorymakers/comments/1in1pwy/comment/mclnvoh/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button