docs: add gitbook info

fknop · web-flow · commit 33ed455161e2 · 2017-06-12T16:21:27.000+02:00
diff --git a/README.md b/README.md
@@ -19,7 +19,7 @@ Read the [contributing guidelines](./CONTRIBUTING.md)
 
 ## Pipes
 
-You can find the documentations in the [`docs`](./docs) folder.
+You can find the documentations in the [`docs`](./docs) folder or on [`GitBook`](https://fknop.gitbooks.io/angular-pipes/).
 
 ### Collections (array)
 
