updating Gemfile
added bootstrap import
generated photos controller
generating dragonfly
added photo model
added migration to add image name to photos
enabled rack cache
corrected name of photos controller
added resources for photos and set root in routes
corrected name of photos view directory
added photos index view
added photos new view
correcting typo in routes
removed extraneous, incorrect photos controller
updated photos index view; updated photos-list stylesheet
renamed application stylesheet
added missing semicolon
added validations to photos model
added shared errors partial; updated photos new view; updated application styling for errors
updated errors partial shared view; updated dragonfly initializer for AWS S3; updated secrets