Added tap pre check (#848)

shared/fileUtils.go

@@ -0,0 +1,20 @@
+package shared
+
+import (
+	"io/ioutil"
+	"os"
+)
+
+func ReadFromFile(path string) ([]byte, error) {
+	reader, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+
+	data, err := ioutil.ReadAll(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	return data, nil
+}