Add missing header to own vector tiles tut

docs/own-vector-tiles.md

@@ -1,3 +1,9 @@
+---
+layout: page
+title: Own Vector Tiles
+published: true
+---
+
 # Create your own vector tiles
 
 We use Docker extensively for development and deployment. The easiest way to get started is using [Docker Compose](https://www.docker.com/docker-compose).