Add exit preview api cb

Author: ravewebdev

pages/api/exit-preview.js

@@ -0,0 +1,11 @@
+/**
+ * Exit preview mode and redirect to homepage.
+ *
+ * @param {object} req Instance of http.IncomingMessage.
+ * @param {object} res Instance of http.ServerResponse.
+ */
+export default async function exit(req, res) {
+  res.clearPreviewData()
+  res.writeHead(307, {Location: '/'})
+  res.end()
+}