Updated README on opening with IDEA

.gitignore

@@ -8,6 +8,8 @@ dest/
 # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
 # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
 
+.idea/
+
 # User-specific stuff
 .idea/**/workspace.xml
 .idea/**/tasks.xml

04-multi-project-build/README.md

@@ -1,8 +1,10 @@
 # gradle multi-project build
 
-1. Hierarchical (aka one root tree)
+1. Hierarchical (aka one root tree) -- i.e. _Maven multi-modules style_
 2. Flat (no tree)
 
+> Focus on `settings.gradle` file i.e. `include` Vs `includeFlat`
+
 ```
 cd hierarchical
 tree

README.md

@@ -8,14 +8,27 @@
     gw -h
     ```
 
+- However, Gradle has a concept called, localised build wrapper script that go along with source code that it meant to build. Hence, you will find these additional auto-generated _fallout-files_ in every other Gradle projects. You may pay no-attention these files on the starter!
+    ```
+    gradlew
+    gradlew.bat
+    gradle/
+    gradle/wrapper/
+    gradle/wrapper/gradle-wrapper.jar
+    gradle/wrapper/gradle-wrapper.properties
+    ```
+
+- Opening with IntelliJ IDEA
+    > 🙋‍♂️ Note that this tute is meant to follow with command line (Terminal). You may still open with IntelliJ IDEA but, _DO NOT AUTO IMPORT_ when _build script detected_ message balloon-y pop-up. If you happen to click auto import by mistake, close it, `rm -rf .idea` and reopen again. 
+
+    > For that, I would recommend to use Sublime or VSCode or even vim! Just to avoid confusion that may arise with any Java IDE auto setup upon opening thing-y.
 
 ### Resources
 
 - https://gradle.org/install/
 - https://github.com/dougborg/gdub
 - https://www.baeldung.com/gradle
 
-
 ### Useful commands
 
 ```