Docs: Webstorm file watcher screenshot (#2603)

* Docs: Webstorm file watcher screenshot

* Docs: webstorm file-watcher - Relative image paths

editors/webstorm/README.md

@@ -11,7 +11,7 @@ Go to *File | Settings | Tools | External Tools* for Windows and Linux or *WebSt
 * **Parameters** set `--write [other opts] $FilePathRelativeToProjectRoot$`
 * **Working directory** set `$ProjectFileDir$`
 
-![Example](https://raw.githubusercontent.com/prettier/prettier/master/editors/webstorm/with-prettier.png)
+![Example](./with-prettier.png)
 
 ### Process directories
 
@@ -35,7 +35,11 @@ To automatically format using `prettier` on save, you can use a file watcher.
 
 Go to *File | Settings | Tools | File Watchers* for Windows and Linux or *WebStorm | Preferences | Tools | File Watchers* for OS X and click **+** to add a new tool. Let’s name it **Prettier**.
 
+* **File Type**: JavaScript
+* **Scope**: Current File
 * **Program** set the full path to a `prettier` executable, such as `/Users/developer/repo/jest/node_modules/.bin/prettier` (on OS X and Linux) or `C:/\Users\developer\repo\jest\node_modules\.bin\prettier.cmd` (on Windows).
-* **Parameters** set `--write [other opts] $FilePath$`
+* **Arguments** set `--write [other opts] $FilePath$`
 * **Working directory** set `$ProjectFileDir$`
-* **Immediate file synchronization**: Uncheck to reformat on Save only (otherwise code will jump around while you type)
+* **Immediate file synchronization**: Uncheck to reformat on Save only (otherwise code will jump around while you type).
+
+![Example](./prettier-file-wacther.png)