feat: image upload + list root assets (wip)

server/helpers/asset.js

@@ -0,0 +1,12 @@
+const crypto = require('crypto')
+
+/* global WIKI */
+
+module.exports = {
+  /**
+   * Generate unique hash from page
+   */
+  generateHash(assetPath) {
+    return crypto.createHash('sha1').update(assetPath).digest('hex')
+  }
+}