sorted image dir listing
added gif support
made app accessible on machines other than localhost
added PIL (Pillow) dependency
button to rotate images
button to delete individual image, cleaned up admin interface
added vote counter to user view
made css scale with page height, added title and caption to images
removed heroku link
changed from ip to cookies to distinguish different users
added voting, increase max upload, password protect
flask 100MB limit, sort for valid images, fix upload non-image bug
added admin page for uploading images
left and right arrow keys, slider follows current image
improved README
added requirements, update to python 3.7.6
basic gallery layout
flask vue hello world template