Readme notes.

README.md

@@ -1,12 +1,37 @@
 
 # OpenWRT builder
 
-This image provides a toolchain to build OpenWRT for different hardware.
+This image provides a toolchain to build OpenWRT for different hardware devices.
+
+## Get the docker image
+
+### Pre-built image
+
+    docker pull caligari/openwrt-builder
+
+### From Dockerfile
+
+    git clone git@github.com:rafacouto/docker-openwrt-builder.git
+    cd docker-openwrt-builder
+    docker build -t caligari/openwrt-builder .
 
 ## Usage
 
--ToDo-
+    docker run -v $(pwd):/usr/local/openwrt/src --rm caligari/openwrt-builder
+
+will show the help:
+
+    -ToDo-
+
+### Compile an OpenWRT version to a hardware target
 
 ## Related info
 
 - [OpenWRT wiki](https://wiki.openwrt.org/)
+
+## Thanks
+
+- [Javier Loureiro](https://twitter.com/StaticBoardsES) who has the idea for Raspberry Pi devices and provided config files for those ones.
+- [OpenWRT community](https://openwrt.org/) for its great product.
+
+