update docker readme

Author: rodber

README.md

@@ -52,6 +52,17 @@ Chevereto-Free is forked from [Chevereto V3.16.2](https://releases.chevereto.com
 
 ## Installation
 
+### Docker
+
+To install using Docker:
+
+* [COMPOSE](docs/COMPOSE.md)
+* [DEVELOPMENT](docs/DEVELOPMENT.md)
+
+To build Docker tagged images:
+
+* [BUILDING](docs/BUILDING.md)
+
 ### cPanel
 
 * Check the [Chevereto cPanel setup](https://v3-docs.chevereto.com/setup/server/cpanel.html).

docs/BUILDING.md

@@ -1,9 +1,5 @@
 # Building
 
-## Composer
-
-`todo`
-
 ## Docker build
 
 * **Tip:** Tag `ghcr.io/rodber/chevereto-free:1.6` to override the [ghcr package](https://github.com/rodber/chevereto-free/pkgs/container/chevereto-free) with local