Añadido engitignore el key.properties y cambios en build.gradle para publicacion

.gitignore

@@ -44,3 +44,5 @@ app.*.map.json
 
 #keystore
 clave-crcivan.jks
+keystore-crcivan.jks
+key.properties

android/app/build.gradle

@@ -4,6 +4,12 @@ plugins {
     id "dev.flutter.flutter-gradle-plugin"
 }
 
+def keystoreProperties = new Properties()
+def keystorePropertiesFile = rootProject.file('key.properties')
+if (keystorePropertiesFile.exists()) {
+    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+}
+
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
@@ -26,7 +32,21 @@ android {
     namespace "com.asociacionador.crcivan"
     compileSdk flutter.compileSdkVersion
     ndkVersion flutter.ndkVersion
+    signingConfigs {
+        release {
+            keyAlias = keystoreProperties['keyAlias']
+            keyPassword = keystoreProperties['keyPassword']
+            storeFile = keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
+            storePassword = keystoreProperties['storePassword']
+        }
+    }
+    buildTypes {
+        release {
+            signingConfig = signingConfigs.release
+            debuggable false
+        }
 
+    }
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
@@ -50,14 +70,6 @@ android {
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }
-
-    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
-        }
-    }
 }
 
 flutter {