added official drone images to README

README.md

@@ -44,6 +44,80 @@ notify:
       - burke@drone.io
 ```
 
+### Images
+
+In the above example we used a custom Docker image from index.docker.io **mischief/docker-golang**
+
+Drone also provides official build images. These images are configured specifically for CI and
+have many common software packages pre-installed (git, xvfb, firefox, libsqlite, etc).
+
+Official Drone images are referenced in the **.drone.yml** by an alias:
+
+```sh
+image: go1.2   # same as bradrydzewski/go:1.2
+```
+
+Here is a list of our official images:
+
+```sh
+# these are the base images for all Drone containers.
+# these are BIG (~3GB) so make sure you have a FAST internet connection
+docker pull bradrydzewski/ubuntu
+docker pull bradrydzewski/base
+
+# clojure images
+docker pull bradrydzewski/lein             # image: lein
+
+# dart images
+docker pull bradrydzewski/dart:stable      # image: dart
+
+# erlang images
+docker pull bradrydzewski/erlang:R16B      # image: erlangR16B
+docker pull bradrydzewski/erlang:R16B02    # image: erlangR16B02
+docker pull bradrydzewski/erlang:R16B01    # image: erlangR16B01
+
+# gcc images (c/c++)
+docker pull bradrydzewski/gcc:4.6          # image: gcc4.6
+docker pull bradrydzewski/gcc:4.8          # image: gcc4.8
+
+# go images
+docker pull bradrydzewski/go:1.0           # image: go1
+docker pull bradrydzewski/go:1.1           # image: go1.1
+docker pull bradrydzewski/go:1.2           # image: go1.2
+
+# haskell images
+docker pull bradrydzewski/haskell:7.4      # image: haskell
+
+# java and jdk images
+docker pull bradrydzewski/java:openjdk6    # image: openjdk6
+docker pull bradrydzewski/java:openjdk7    # image: openjdk7
+docker pull bradrydzewski/java:oraclejdk7  # image: oraclejdk7
+docker pull bradrydzewski/java:oraclejdk8  # image: oraclejdk8
+
+# node images
+docker pull bradrydzewski/node:0.10        # image node0.10
+docker pull bradrydzewski/node:0.8         # image node0.8
+
+# php images
+docker pull bradrydzewski/php:5.5          # image: php5.5
+docker pull bradrydzewski/php:5.4          # image: php5.4
+
+# python images
+docker pull bradrydzewski/python:2.7       # image: python2.7
+docker pull bradrydzewski/python:3.2       # image: python3.2
+docker pull bradrydzewski/python:3.3       # image: python3.3
+docker pull bradrydzewski/python:pypy      # image: pypy
+
+# ruby images
+docker pull bradrydzewski/ruby:2.0.0       # image: ruby2.0.0
+docker pull bradrydzewski/ruby:1.9.3       # image: ruby1.9.3
+
+# scala images
+docker pull bradrydzewski/scala:2.10.3     # image: scala2.10.3
+docker pull bradrydzewski/scala:2.9.3      # image: scala2.9.3
+
+```
+
 ### Environment
 
 Drone clones your repository into a Docker container
@@ -53,8 +127,8 @@ at the following location:
 /var/cache/drone/src/github.com/$owner/$name
 ```
 
-Please take this into consideration when setting up your build image. For example,
-you may need set the $GOAPTH or other environment variables appropriately.
+Please take this into consideration when setting up your build commands, or
+if you are using a custom Docker image.
 
 ### Databases