Ruby on Rails 5 ( Dropzone.js)

Check pls [login to view URL] On a pages become_a_host and edit_profile Need to configure [login to view URL] ( it's currently bad working, write some redirects and some little code, and configure an aws s3 bucket for uploading photos), check pls conditions when: 1) user don't upload any photo and submit listing 2) user miss some fields and submit listing etc.. Everything should work perfectly, it should render messages with warnings like "You need to upload more photos" etc...