Add missing installation instruction

README.md

@@ -39,6 +39,10 @@ project(':react-native-documentscanner-android').projectDir = new File(rootProje
 ```java
 include ':openCVLibrary310'
 project(':openCVLibrary310').projectDir = new File(rootProject.projectDir,'../node_modules/react-native-documentscanner-android/android/openCVLibrary310')
+```
+ #### Add this to android/app/build.gradle (dependencies section)
+```
+implementation project(':react-native-documentscanner-android')
 ```
 
 ### Usage
@@ -109,4 +113,4 @@ The images are saved in `Documents` folder.
 
 Inspired in android project 
 - https://github.com/ctodobom/OpenNoteScanner
-- https://github.com/Michaelvilleneuve/react-native-document-scanner
+- https://github.com/Michaelvilleneuve/react-native-document-scanner