Use express-session-level

config/secret/index.js

@@ -0,0 +1,13 @@
+const uuid = require('uuid/v4');
+const path = require('path');
+const fs = require('fs');
+
+const secretFilePath = path.join(__dirname, 'secret.txt');
+
+try {
+  module.exports = fs.readFileSync(secretFilePath).toString();
+} catch (_) {
+  const secret = uuid();
+  fs.writeFileSync(secretFilePath, secret);
+  module.exports = secret;
+}