Imports github.com/julienschmidt/httprouter github.com/nfnt/resize github.com/grandcat/zeroconf github.com/skip2/go-qrcode Standard library imports bytes crypto/ecdsa crypto/elliptic crypto/rand crypto/x509 crypto/x509/pkix encoding/base64 encoding/json encoding/pem flag fmt image image/jpeg io io/ioutil log math/big math/rand net net/http net/url os os/signal path/filepath strconv strings syscall time