Add minimal README instructions

Author: codergeek121

Diff for: README.md

@@ -1,28 +1,33 @@
 # EmailErrorReporter
-Short description and motivation.
 
-## Usage
-How to use my plugin.
+> [!CAUTION]
+> This is very early prototype
+
+`email_error_reporter` uses the new [Rails error reporting API](https://guides.rubyonrails.org/error_reporting.html#error-reporting) to send emails whenever an exception is being reported. It works out of the box with HTTP requests, job errors and the rails runner errors.
 
 ## Installation
-Add this line to your application's Gemfile:
 
-```ruby
-gem "email_error_reporter"
-```
+Add the gem:
 
-And then execute:
 ```bash
-$ bundle
+bundle add email_error_reporter && bundle install
 ```
 
-Or install it yourself as:
-```bash
-$ gem install email_error_reporter
+and configure the email addresses that should receive an email in the case of an exception:
+
+```ruby
+# application.rb
+config.email_error_reporter.to = ["youremail@example.com"]
 ```
 
-## Contributing
-Contribution directions go here.
+`email_error_reporter` will reuse your environment specific ActionMailer configuration for delivering emails.
+
+## Usage
+
+All exceptions are reported automatically. No additional code required.
+
+Please consult the [official guides](https://guides.rubyonrails.org/error_reporting.html) for an introduction to the error reporting API.
 
 ## License
+
 The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).