Update: add new constants

Author: dpaez

lib/constants.js

@@ -22,6 +22,9 @@ module.exports = {
   unstructuredLog: p.join(DAEMON_ROOT, 'output.log'),
   structuredLog: p.join(DAEMON_ROOT, 'log.json'),
 
+  importKeyFilePath: '.hyperdrive-import-key',
+  exportKeyFilePath: '.hyperdrive-export-key',
+
   env: {
     endpoint: process.env['HYPERDRIVE_ENDPOINT'],
     token: process.env['HYPERDRIVE_TOKEN'],