Image ranking app for pairwise contests.
Create contest directories under contests/; each directory name is the shareable URL path.
mkdir -p contests/contest123
# add images to contests/contest123
nix develop -c cargo runOpen http://127.0.0.1:3000/contest123.
CONTESTS_DIR: directory containing contest subdirectories, default./contestsDATABASE_URL: SQLite database path, default./rank.dbBIND_ADDR: bind address, default127.0.0.1:3000