docs(readme): add README

README.md

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+# sharebox
+
+Sharebox is a web file manager application. Its intent is to share files quickly from your host
+machine to local network or over the internet with minimal or zero configuration. It comes bundled in a single executable file.
+
+For sharing over the internet, it has included [vex](https://github.com/bleenco/vex) client, so you don't need to worry about firewall or NAT which is configured on your local network.
+
+## Usage
+
+### Sharing specific folder
+
+```sh
+sharebox -dir /home/bleenco/Videos
+```
+
+### Help
+
+For complete command line usage, please see
+
+```sh
+sharebox --help
+```
+
+## License
+
+> The MIT License
+>
+> Copyright (c) 2018 Bleenco GmbH https://bleenco.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.