(release): prepare android build config and signing

android/app/build.gradle

@@ -3,12 +3,27 @@ apply plugin: 'com.android.application'
 android {
     namespace = "pl.nonograms.app"
     compileSdk = rootProject.ext.compileSdkVersion
+
+    signingConfigs {
+        release {
+            def keystorePropertiesFile = rootProject.file("keystore.properties")
+            if (keystorePropertiesFile.exists()) {
+                def keystoreProperties = new Properties()
+                keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+                storeFile = file(keystoreProperties['storeFile'])
+                storePassword = keystoreProperties['storePassword']
+                keyAlias = keystoreProperties['keyAlias']
+                keyPassword = keystoreProperties['keyPassword']
+            }
+        }
+    }
+
     defaultConfig {
         applicationId "pl.nonograms.app"
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
-        versionCode 1
-        versionName "1.0"
+        versionCode 1144
+        versionName "1.14.4"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         aaptOptions {
              // Files and dirs to omit from the packaged assets dir, modified to accommodate modern web apps.
@@ -18,8 +33,9 @@ android {
     }
     buildTypes {
         release {
+            signingConfig signingConfigs.release
             minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
 }