docs(readme): add Greenkeeper badge

Author: greenkeeper[bot]

README.md

@@ -0,0 +1,9 @@
+# faucet-pipeline-static
+[![Greenkeeper badge](https://badges.greenkeeper.io/faucet-pipeline/faucet-pipeline-static.svg)](https://greenkeeper.io/)
+
+You can find the documentation
+[here](https://github.com/faucet-pipeline/faucet-pipeline).
+
+## License
+
+faucet-pipeline-static is licensed under Apache 2.0 License.