Merge pull request #807 from keeganwitt/groovy

added Groovy

groovy/README-short.txt

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+Apache Groovy is a multi-faceted language for the Java platform.

groovy/content.md

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+# What is Groovy?
+
+[Apache Groovy](http://groovy-lang.org/) is a powerful, optionally typed and dynamic language, with static-typing and static compilation capabilities, for the Java platform aimed at improving developer productivity thanks to a concise, familiar and easy to learn syntax. It integrates smoothly with any Java program, and immediately delivers to your application powerful features, including scripting capabilities, Domain-Specific Language authoring, runtime and compile-time meta-programming and functional programming.
+
+%%LOGO%%
+
+# How to use this image
+
+## Starting Groovysh
+
+`docker run -it --rm --name groovy groovy:alpine`
+
+## Running a Groovy script
+
+`docker run --rm -v "$PWD":/scripts -w /scripts --name groovy groovy:alpine groovy <script> <script-args>`

groovy/github-repo

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+https://github.com/groovy/docker-groovy

groovy/license.md

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+View [license information](http://www.apache.org/licenses/LICENSE-2.0.html) for the software contained in this image.