added compiler in docker image

CONTRIBUTING.md

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+How to Contribute
+=================
+
+This project welcomes your contribution. There are several ways to help out:
+
+* Create an [issue](https://github.com/femtopixel/docker-google-closure-compiler-api/issues/) on GitHub,
+if you have found a bug or have an idea for a feature
+* Write test cases for open bug issues
+* Write patches for open bug/feature issues
+
+Issues
+------
+
+* Submit an [issue](https://github.com/femtopixel/docker-google-closure-compiler-api/issues/)
+  * Make sure it does not already exist.
+  * Clearly describe the issue including steps to reproduce, when it is a bug.
+  * Make sure you note the version you use.
+
+Additional Resources
+--------------------
+
+* [Existing issues](https://github.com/femtopixel/docker-google-closure-compiler-api/issues/)
+* [General GitHub documentation](https://help.github.com/)
+* [GitHub pull request documentation](https://help.github.com/send-pull-requests/)

Dockerfile

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+FROM python:alpine
+
+MAINTAINER Jay MOULIN <jaymoulin@gmail.com>
+
+COPY ./compiler.py /bin/compiler.py
+COPY ./entrypoint.sh /bin/entrypoint
+ENTRYPOINT ["/bin/entrypoint"]
+CMD ["/bin/compiler.py"]

LICENSE

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 MIT License
 
-Copyright (c) 2017 Jay MOULIN
+Copyright (c) 2017 FemtoPixel
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

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+Google Closure Compiler API - Docker Image
+==========================================
+
+[![latest release](https://img.shields.io/github/release/femtopixel/docker-google-closure-compiler-api.svg "latest release")](http://github.com/femtopixel/docker-google-closure-compiler-api/releases)
+[![Bitcoin donation](https://github.com/jaymoulin/jaymoulin.github.io/raw/master/btc.png "Bitcoin donation")](https://m.freewallet.org/id/374ad82e/btc)
+[![Litecoin donation](https://github.com/jaymoulin/jaymoulin.github.io/raw/master/ltc.png "Litecoin donation")](https://m.freewallet.org/id/374ad82e/ltc)
+
+This image allows you to Compile your JS code using [Google Closure Compiler API](https://developers.google.com/closure/compiler/) in CLI
+
+Usage
+-----
+```
+usage: compiler.py [-h] [--js JS] [--js_output_file JS_OUTPUT_FILE]
+                   [--compilation_level {WHITESPACE_ONLY,SIMPLE_OPTIMIZATIONS,ADVANCED_OPTIMIZATIONS}]
+
+optional arguments:
+  -h, --help            show this help message and exit
+  --js JS               Input file
+  --js_output_file JS_OUTPUT_FILE
+                        Output file
+  --compilation_level {WHITESPACE_ONLY,SIMPLE_OPTIMIZATIONS,ADVANCED_OPTIMIZATIONS}
+                        Compilation level
+```
+
+## Default values
+
+`--js` : /dev/stdin (input your code)
+`--js_output_file` : /dev/stdout (Prints compiled code in the shell)
+`--compilation_level` : WHITESPACE_ONLY
+
+Docker usage
+------------
+
+```
+docker run --rm -ti -v /path/to/my/file.js:/root/myfile.js femtopixel/google-closure-compiler --js /root/myfile.js
+```

compiler.py

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+#!/usr/local/bin/python3
+
+import http.client, urllib.parse, sys, argparse
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--js", default='/dev/stdin', help="Input file")
+    parser.add_argument("--js_output_file", default='/dev/stdout', help="Output file")
+    parser.add_argument("--compilation_level", default='WHITESPACE_ONLY', choices=['WHITESPACE_ONLY', 'SIMPLE_OPTIMIZATIONS', 'ADVANCED_OPTIMIZATIONS'], help="Compilation level")
+    args = parser.parse_args()
+    js_code = open(args.js, 'r')
+
+    params = urllib.parse.urlencode([
+        ('js_code', js_code.read()),
+        ('compilation_level', args.compilation_level),
+        ('output_format', 'text'),
+        ('output_info', 'compiled_code'),
+    ])
+
+    js_code.close()
+    headers = { "Content-type": "application/x-www-form-urlencoded" }
+    conn = http.client.HTTPConnection('closure-compiler.appspot.com')
+    conn.request('POST', '/compile', params, headers)
+    response = conn.getresponse()
+    data = response.read()
+    output_code = open(args.js_output_file, 'w')
+    output_code.write(data.decode("utf-8"))
+    output_code.close()
+    conn.close()
+
+if __name__ == "__main__":
+    main()

entrypoint.sh

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+#!/bin/sh
+
+set -e
+if [ "${1#-}" != "$1" ]; then
+    set -- /bin/compiler.py "$@"
+fi
+
+exec "$@"