Q:

After each push to Heroku I get 404 errors on images

I am having issues with my Rails App on Heroku. code-dojo.herokuapp.com
After every push to heroku any images I uploaded with Carrierwave Gem return a 404 error message.
Do I need to precompile this folder or point to it ?
Does Heroku replace this folder with a blank one?
Should I create my app with all the images on locathost and then push the database?

A:

Heroku is Read-only Filesystem
The following types of behaviors are not supported:
Caching pages in the public directory
Saving uploaded assets to local disk (e.g. with attachment_fu or paperclip)
Writing full-text indexes with Ferret
Writing to a filesystem database like SQLite or GDBM
Accessing a git repo for an app like git-wiki

