Imports github.com/artyom/phash github.com/disintegration/imaging github.com/rwcarlsen/goexif/exif github.com/rwcarlsen/goexif/tiff golang.org/x/sync/errgroup Standard library imports bytes context encoding/base64 encoding/json errors flag fmt hash/fnv html/template image image/jpeg io io/ioutil log os path/filepath runtime sort strings sync time