Install krypton's kr client on Alpine Linux

kr-alpine.sh

#!/bin/sh

if [ $(id -u) -ne 0 ]
  then echo "-- This script only works when run as root. --"
  exit
fi

echo "-- installing dependancies: go make sudo git"
apk add go make sudo git

echo '-- setting up $GOPATH'
export GOPATH=$HOME/.go
mkdir -p $GOPATH

echo "-- downloading kr source"
go get github.com/kryptco/kr

echo "-- building and installing kr"
cd $GOPATH/src/github.com/kryptco/kr && make install && kr restart

echo "-- done! use 'kr pair' to get started."
echo "-- WARNING: kr on Alpine is a bit weird. i dont know why. if it breaks its not my fault."