README.md in archer-rails-0.3.0 vs README.md in archer-rails-0.4.0

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+ new

@@ -4,9 +4,11 @@
 
 ![Screenshot](https://ankane.org/images/archer-readme.png)
 
 Designed for platforms with ephemeral filesystems
 
+[![Build Status](https://github.com/ankane/archer/workflows/build/badge.svg?branch=master)](https://github.com/ankane/archer/actions)
+
 ## Installation
 
 Add this line to your application’s Gemfile:
 
 ```ruby