Reorder links and update text in readme

README.md

@@ -4,12 +4,14 @@ OpenMapTiles is an extensible and open tile schema based on the OpenStreetMap. I
 
 We encourage you to collaborate, reuse and adapt existing layers and add your own layers or use our approach for your own vector tile project. Feel free to fork the repo and experiment. The repository is built on top of the [openmaptiles/openmaptiles-tools](https://github.com/openmaptiles/openmaptiles-tools) to simplify vector tile creation.
 
-- :link: Discuss at the #openmaptiles channel at [OSM Slack](https://osmus-slack.herokuapp.com/)
-- :link: Docs https://openmaptiles.org/docs
+Please keep in mind that OpenMapTiles schema should stay displaying general topographic content. In case of creating a new layer or expanding an existing one with a specific theme, please create a fork and invite other community members to cooperate on your topic in this separate fork. OpenMapTiles schema is used in many projects all over the world and the size of the final vector tiles needs to be considered in any update.
+
 - :link: Schema https://openmaptiles.org/schema
+- :link: Docs https://openmaptiles.org/docs
 - :link: Production package: https://openmaptiles.com/production-package/
 - :link: Hosting https://www.maptiler.com/cloud/
 - :link: Create own layer https://github.com/openmaptiles/skiing
+- :link: Discuss at the #openmaptiles channel at [OSM Slack](https://osmus-slack.herokuapp.com/)
 
 ## Styles