added document_secret as basis for API authentication

routes/api/login.js

@@ -0,0 +1,18 @@
+"use strict";
+
+const express = require('express');
+const router = express.Router();
+const auth = require('../../services/auth');
+const sql = require('../../services/sql');
+const migration = require('../../services/migration');
+
+router.post('', async (req, res, next) => {
+
+
+    res.send({
+        'db_version': parseInt(await sql.getOption('db_version')),
+        'app_db_version': migration.APP_DB_VERSION
+    });
+});
+
+module.exports = router;