flutter installation notes

backend/expressJS/README.md

@@ -4,7 +4,7 @@
 
 [Home](../../README.md)
 
-[Reference](https://expressjs.com/en/starter)
+[Reference](https://expressjs.com/en/starter/installing.html)
 
 Create a project skeleton
 

backend/springboot/README.md

@@ -1,5 +1,7 @@
 # Create Spring Boot Project
 
+[Reference](https://spring.io/projects/spring-boot)
+
 * Browse [Spring Initialzr](https://start.spring.io/)
 * Option to select
   * Gradle
@@ -28,7 +30,6 @@ import org.springframework.web.bind.annotation.RestController;
 public class HomeController {
 
     @GetMapping("/home1")
-    @ResponseBody
     public String Home(){
 
         // log instaciate from  @Slf4j annotation
@@ -53,7 +54,7 @@ home...
 ## Create IntelliJ Debug Configuration
 
 * `Run `> `Edit Configuration...`
-* Add 'bootRun' Task. Click 'Ok'
+* Add `bootRun` Task. Click `OK`
 * Now `Run...` or `Debug...` accordingly
 * Alternatively, goto `main` and right click on side bar to run / debug
 
@@ -67,5 +68,5 @@ public class StarterApplication {
 }
 ```
 
-
+[Build Application Guide](https://spring.io/guides/gs/spring-boot/)
 

mobile/flutter/README.md

@@ -6,8 +6,7 @@
 * Unzip to `C:\tools`
 * Add to environment path `C:\tools\flutter\bin`
 * Install [Android Studio](https://developer.android.com/studio) 
-* Create Android Virtual Device (AVD) with API 29
-  * API 30 not supported
+* Create Android Virtual Device (AVD). Ensure all SDK tools are up-to-date
 * Add `vs code` plugin
   * Flutter
 
@@ -20,7 +19,7 @@ $ flutter create myapp
 $ cd myapp
 ```
 
-Launch AVD using Android Studio
+Launch AVD using Android Studio.
 
 Run the app
 
@@ -28,7 +27,21 @@ Run the app
 // check AVD connectivity
 $ flutter devices
 
+// check dependencies are up-to-date
+$ flutter doctor
+Doctor summary (to see all details, run flutter doctor -v):
+[✓] Flutter (Channel master, 1.26.0-2.0.pre.200, on Microsoft Windows [Version 10.0.19042.685], locale en-SG)
+[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
+[✓] Chrome - develop for the web
+[✓] Android Studio (version 4.1.0)
+[✓] IntelliJ IDEA Community Edition (version 2020.3)
+[✓] VS Code (version 1.52.1)
+[✓] Connected device (2 available)
+
+• No issues found!
+
 // run the app
 $ flutter run
 ```
 
+[Codelab Tutorial](https://flutter.dev/docs/get-started/codelab)