add binder instructions to README #3

README.md

@@ -1,6 +1,6 @@
 # OpenRefine Task Runner (💎+🤖)
 
-[![Codacy Badge](https://app.codacy.com/project/badge/Grade/888dbf663fdd409e8d8fcf8472114194)](https://www.codacy.com/gh/opencultureconsulting/openrefine-task-runner/dashboard)
+[![Codacy Badge](https://app.codacy.com/project/badge/Grade/888dbf663fdd409e8d8fcf8472114194)](https://www.codacy.com/gh/opencultureconsulting/openrefine-task-runner/dashboard) [![Binder](https://notebooks.gesis.org/binder/badge_logo.svg)](https://notebooks.gesis.org/binder/v2/gh/opencultureconsulting/openrefine-task-runner/binder?urlpath=lab/tree/demo.ipynb)
 
 Templates for OpenRefine batch processing (import, transform, export) using the task runner [go-task](https://github.com/go-task/task) and the [openrefine-client](https://github.com/opencultureconsulting/openrefine-client) to control OpenRefine via [its HTTP API](https://docs.openrefine.org/technical-reference/openrefine-api). 
 
@@ -41,6 +41,16 @@ Templates for OpenRefine batch processing (import, transform, export) using the
 * GNU/Linux (tested with Fedora 32)
 * JAVA 8+ (for OpenRefine)
 
+## Demo via binder
+
+[![Binder](https://notebooks.gesis.org/binder/badge_logo.svg)](https://notebooks.gesis.org/binder/v2/gh/opencultureconsulting/openrefine-task-runner/binder?urlpath=lab/tree/demo.ipynb)
+
+- free to use on-demand server with Jupyterlab and Bash Kernel
+- OpenRefine, openrefine-client and go-task [preinstalled](binder/postBuild)
+- no registration needed, will start within a few minutes
+- [restricted](https://notebooks.gesis.org/faq/) to 4 GB RAM and server will be deleted after 10 minutes of inactivity
+- service is provided by GESIS and is intended for use by social scientists
+
 ## Install
 
 1. Clone this git repository