Add package in_app_purchase (not implemented - but otherwise google-play wont verify)

flutter/Makefile

@@ -1,11 +1,5 @@
 
 
-# Setup
-#
-# flutter config --jdk-dir "/usr/lib/jvm/default-runtime/bin"
-# sudo archlinux-java set java-17-openjdk
-#
-
 HASH=$(shell git rev-parse HEAD)
 VERS=$(shell cat pubspec.yaml | grep -oP '(?<=version: ).*') # lazy evaluated!
 
@@ -38,11 +32,21 @@ install-release: java gen
 build-release: java gen
 	flutter build apk       --release
 	cp build/app/outputs/flutter-apk/app-release.apk "_releases/v$(VERS)-release.apk"
+	@echo ""
+	@echo "--> copied APK to _releases  ( Version: $(VERS) )"
+	@echo ""
 	flutter build appbundle --release
 	cp build/app/outputs/bundle/release/app-release.aab "_releases/v$(VERS)-release.aab"
+	@echo ""
+	@echo "--> copied AAB to _releases  ( Version: $(VERS) )"
+	@echo ""
 	flutter build linux     --release
 	cp -r build/linux/x64/release/bundle "_releases/v$(VERS)-linux-release"
 	tar -czf "_releases/v$(VERS)-linux-release.tar.gz" -C build/linux/x64/release/bundle .
+	@echo ""
+	@echo "--> copied linux-binary to _releases  ( Version: $(VERS) )"
+	@echo ""
+	@echo "Done."
 
 test:
 	dart analyze