Added workflow for CI/CD

android/Gemfile

@@ -0,0 +1,3 @@
+source "https://rubygems.org"
+
+gem "fastlane"

android/app/build.gradle

@@ -25,6 +25,12 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
+def keystoreProperties = new Properties()
+def keystorePropertiesFile = rootProject.file('key.properties')
+if (keystorePropertiesFile.exists()) {
+    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+}
+
 android {
     compileSdkVersion 32
 
@@ -45,11 +51,20 @@ android {
         ]
     }
 
+    // Use key information file
+    signingConfigs {
+       release {
+           keyAlias keystoreProperties['keyAlias']
+           keyPassword keystoreProperties['keyPassword']
+           storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
+           storePassword keystoreProperties['storePassword']
+       }
+    }
     buildTypes {
         release {
             // TODO: Add your own signing config for the release build.
             // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig signingConfigs.debug
+            signingConfig signingConfigs.release
         }
     }
 }

android/fastlane/Appfile

@@ -0,0 +1 @@
+package_name("com.linagora.android.teammail") # e.g. com.krausefx.app

android/fastlane/Fastfile

@@ -0,0 +1,41 @@
+# 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
+#
+
+opt_out_usage # Opt out of telemetry
+default_platform(:android)
+
+platform :android do
+  desc "Build development version"
+  lane :dev do
+    sh "flutter build apk --verbose --release --dart-define=SERVER_URL=$SERVER_URL"
+  end
+
+  desc "Build and deploy release version"
+  lane :release do
+    track = "alpha"
+    latest_build_number = google_play_track_version_codes(
+      track: track,
+      json_key_data: ENV["PLAY_STORE_CONFIG_JSON"]
+    )[0].to_i
+    build_name = last_git_tag.gsub("v", "")
+    sh "flutter build appbundle --verbose --release --dart-define=SERVER_URL=$SERVER_URL --build-number=#{latest_build_number+1} --build-name=#{build_name}"
+    upload_to_play_store(
+      json_key_data: ENV["PLAY_STORE_CONFIG_JSON"],
+      track: track,
+      aab: "../build/app/outputs/bundle/release/app-release.aab",
+    )
+  end
+end