Use math/rand instead

minotaur.go

 package main
 
 import (
-	"crypto/rand"
 	"encoding/json"
 	"errors"
 	"flag"
@@ -9,6 +8,7 @@ import (
 	"io"
 	"io/ioutil"
 	"log"
+	"math/rand"
 	"mime"
 	"net/http"
 	"os"