You might as well then do a batch JPEG conversion that generates reduced-size thumbnails.

A larger question is what you're trying to accomplish with the web server in the first place. I shoot everything raw, load it all into Lightroom, and my backup solution is a combination of Time Machine (to replicate on a second hard drive) and rsync (to copy the data offsite). A web gallery of raw, untweaked pictures doesn't have all the rich tagging and search capabilities that are built into a professional tool like Lightroom, among other limitations.