documentation: add basic repository description

Author: byCedric

LICENSE.md

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+# The MIT License (MIT)
+
+Copyright (c) 2018 Cedric van Putten <me@bycedric.com>
+
+> Permission is hereby granted, free of charge, to any person obtaining a copy
+> of this software and associated documentation files (the "Software"), to deal
+> in the Software without restriction, including without limitation the rights
+> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+> copies of the Software, and to permit persons to whom the Software is
+> furnished to do so, subject to the following conditions:
+>
+> The above copyright notice and this permission notice shall be included in
+> all copies or substantial portions of the Software.
+>
+> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+> THE SOFTWARE.

README.md

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+# Expo CLI for GitHub Actions
+
+Publish, build or manage your [Expo](https://expo.io) Project with GitHub Actions!
+This repository contains a prebuilt base image with GitHub Actions implementations.
+You can also use [the base image](base) in other Docker-based environments.
+
+## License
+
+The MIT License (MIT). Please see [License File](LICENSE.md) for more information.
+
+--- ---
+
+<p align="center">
+    with :heart: <a href="https://bycedric.com" target="_blank">byCedric</a>
+</p>