use fastlane to deploy android app

frontend/android/fastlane/Fastfile

@@ -0,0 +1,45 @@
+# This file contains the fastlane.tools configuration
+# You can find the documentation at https://docs.fastlane.tools
+#
+# For a list of all available actions, check out
+#
+#     https://docs.fastlane.tools/actions
+#
+# For a list of all available plugins, check out
+#
+#     https://docs.fastlane.tools/plugins/available-plugins
+#
+
+# Uncomment the line if you want fastlane to automatically update itself
+# update_fastlane
+
+default_platform(:android)
+
+platform :android do
+  desc "Runs all the tests"
+  lane :test do
+    gradle(task: "test")
+  end
+
+  desc "Submit a new build to the closed testing lane"
+  lane :closed_testing do
+    gradle(
+      task: "bundle",
+      # flavor: "staging",
+      )
+
+    upload_to_play_store(
+      track: 'alpha',
+      skip_upload_apk: true,
+      skip_upload_changelogs: true,
+
+      )
+  
+  end
+
+  desc "Deploy a new version to the Google Play"
+  lane :deploy do
+    gradle(task: "clean assembleRelease")
+    upload_to_play_store
+  end
+end