It's fairly opaque to the user that there are problems with `sharp` in an out-of-the-box Linux environment, and so if `sharp` is going to be explicitly recommended for non-Vercel production environments then I think it's a good idea to make sure people are aware of the possible issues.

My vanilla Heroku deployment was using wild amounts of memory until I found the details in the sharp docs about how to configure the memory allocator, so signposting this a bit better should help prevent issues in future.