docs: mention AGPL v3 license in README

README.md

@@ -95,12 +95,39 @@ npx expo run:ios --device
 
 ### Android — local release APK
 
+The release build embeds the JS bundle, so it runs standalone without Metro.
+The default config signs with the debug keystore, which is fine for personal device testing.
+
 ```bash
 cd android
 ./gradlew assembleRelease
 # Output: android/app/build/outputs/apk/release/app-release.apk
 ```
 
+**Install on a connected device via ADB:**
+
+```bash
+# Add ADB to PATH (one-time, macOS)
+echo 'export PATH="$PATH:$HOME/Library/Android/sdk/platform-tools"' >> ~/.zprofile
+source ~/.zprofile
+
+# Install (device must have USB Debugging enabled)
+adb install -r app/build/outputs/apk/release/app-release.apk
+```
+
+The `-r` flag reinstalls over any existing version on the device.
+
+**Android Studio note:** If Gradle sync fails with `Cannot run program "node"`, Android Studio
+launched without Homebrew in its PATH. Fix by opening from the terminal:
+```bash
+open -a "Android Studio" android/
+```
+Or make it permanent (no sudo needed):
+```bash
+launchctl setenv PATH "/opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
+```
+Then fully quit and reopen Android Studio.
+
 To build a release AAB (required for Play Store):
 
 ```bash
@@ -108,7 +135,13 @@ To build a release AAB (required for Play Store):
 # Output: android/app/build/outputs/bundle/release/app-release.aab
 ```
 
-**Signing:** Create a keystore and configure `android/app/build.gradle` with your signing config before a production release. See [React Native signing docs](https://reactnative.dev/docs/signed-apk-android).
+**Production signing:** For Play Store or sharing with others, generate a proper keystore:
+```bash
+keytool -genkey -v -keystore android/app/bincio-rec.keystore \
+  -alias bincio-rec -keyalg RSA -keysize 2048 -validity 10000
+```
+Then update `signingConfigs.release` in `android/app/build.gradle` to reference it.
+See [React Native signing docs](https://reactnative.dev/docs/signed-apk-android).
 
 ### iOS — local release archive
 
@@ -204,3 +237,7 @@ npx expo install <package-name>
 npx expo prebuild --clean   # regenerates android/ and ios/
 cd ios && pod install && cd ..
 ```
+
+## License
+
+[AGPL v3](LICENSE) — see the `LICENSE` file for details.