README.md in logstash-input-file-4.1.12 vs README.md in logstash-input-file-4.1.13

- old
+ new

@@ -37,9 +37,14 @@
 
 ```sh
 bundle install
 ```
 
+ - Build the jar library used for watching files
+```bash
+./gradlew build
+```
+
 - Run tests
 
 ```sh
 bundle exec rspec
 ```