Revert "updated db seed file and css"

This reverts commit 0570c7598f6a4460dc50d0e1092c1ad9553b2e2d.
Revert "Revert "updated db seed file and css""

This reverts commit 9ff2b35e53afd9a3d73c7411f79ba926a5c60db2.
redirect home page to images index, fixed query parameters to use image ID instead of URL; now uses ID to find image url and set as instance variable