Update README and gitignore

Same patterns as other engines for gitignore

engines/registry/.gitignore

@@ -1,6 +1,3 @@
-/.bundle/
-/doc/
-/log/*.log
-/pkg/
-/tmp/
-.byebug_history
+.bundle/
+log/*.log
+pkg/

engines/registry/README.md

@@ -1,28 +1,3 @@
 # Registry
-Short description and motivation.
-
-## Usage
-How to use my plugin.
-
-## Installation
-Add this line to your application's Gemfile:
-
-```ruby
-gem 'registry'
-```
-
-And then execute:
-```bash
-$ bundle
-```
-
-Or install it yourself as:
-```bash
-$ gem install registry
-```
-
-## 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).
+Instances in the cloud have the option to use registry.suse.com for their containers,
+this engine provides the endpoint to auth and handling of that access to the registry