Improve setup instructions

README.md

@@ -1,12 +1,28 @@
 # Setup
+
+Clone the repository
+and in the root directory
+of the repo,
+execute:
+
 ```bash
-git clone …
-cargo tauri android init
-git restore gen/android/app/build.gradle.kts
-cargo tauri img/icon.svg
-# Set up gen/android/keystore.properties
+cargo tauri icon assets/icon.svg
 ```
 
+## Android
+
+To enable android development,
+additionally execute
+
+```bash
+rm gen/android/app/build.gradle.kts
+NDK_HOME=<path> ANDROID_HOME=<path> cargo tauri android init
+git restore gen/android/app/build.gradle.kts
+```
+
+and set up `gen/android/keystore.properties`,
+e.g. following https://v2.tauri.app/distribute/sign/android/.
+
 # Run
 
 ## Linux Development