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Co-authored-by: viehlieb <pf@pragma-shift.net>

README.md

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+# GroupOrderInvoice
+Short description and motivation.
+
+## Usage
+How to use my plugin.
+
+## Installation
+Add this line to your application's Gemfile:
+
+```ruby
+gem "group_order_invoice"
+```
+
+And then execute:
+```bash
+$ bundle
+```
+
+Or install it yourself as:
+```bash
+$ gem install group_order_invoice
+```
+
+## Contributing
+Contribution directions go here.
+
+## License
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).