diff --git a/.github/workflows/build-release.yml b/.github/workflows/build-release.yml
new file mode 100644
index 00000000..a6d84848
--- /dev/null
+++ b/.github/workflows/build-release.yml
@@ -0,0 +1,29 @@
+name: Build Release APK
+
+on:
+  release:
+    types: [ published ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up JDK
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'zulu'
+          java-version: '11'
+
+      - name: Make gradlew executable
+        run: chmod +x ./gradlew
+
+      - name: Build release APK
+        run: ./gradlew assembleRelease --warning-mode all --stacktrace
+
+      - name: Upload APK
+        uses: actions/upload-artifact@v2
+        with:
+          name: app-release
+          path: app/build/outputs/apk/release/*.apk
\ No newline at end of file
diff --git a/.github/workflows/gradle-wrapper-validation.yml b/.github/workflows/gradle-wrapper-validation.yml
new file mode 100644
index 00000000..cd58806b
--- /dev/null
+++ b/.github/workflows/gradle-wrapper-validation.yml
@@ -0,0 +1,10 @@
+name: Validate Gradle Wrapper
+on: [ push, pull_request ]
+
+jobs:
+  validation:
+    name: "Validation"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.5
+      - uses: gradle/wrapper-validation-action@v1.0.4
\ No newline at end of file
diff --git a/app/src/main/java/com/hoc/comicapp/ui/register/RegisterVM.kt b/app/src/main/java/com/hoc/comicapp/ui/register/RegisterVM.kt
index 156f0ccb..64130ffb 100644
--- a/app/src/main/java/com/hoc/comicapp/ui/register/RegisterVM.kt
+++ b/app/src/main/java/com/hoc/comicapp/ui/register/RegisterVM.kt
@@ -150,7 +150,7 @@ class RegisterVM(
   private fun isValidUser(user: User): Boolean {
     val (email, password, fullName) = user
     return getEmailError(email) === null &&
-        getPasswordError(password) === null &&
-        getFullNameError(fullName) === null
+      getPasswordError(password) === null &&
+      getFullNameError(fullName) === null
   }
 }
diff --git a/buildSrc/src/main/kotlin/com/hoc/comicapp/plugin/ComicAppPlugin.kt b/buildSrc/src/main/kotlin/com/hoc/comicapp/plugin/ComicAppPlugin.kt
index 543002df..e926d8f9 100644
--- a/buildSrc/src/main/kotlin/com/hoc/comicapp/plugin/ComicAppPlugin.kt
+++ b/buildSrc/src/main/kotlin/com/hoc/comicapp/plugin/ComicAppPlugin.kt
@@ -17,6 +17,8 @@ import org.gradle.kotlin.dsl.withType
 import org.jetbrains.kotlin.gradle.plugin.KotlinBasePluginWrapper
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import versions
+import java.lang.System.getenv
+import java.util.Properties
 
 private inline val Project.libraryExtension get() = extensions.getByType<LibraryExtension>()
 private inline val Project.appExtension get() = extensions.getByType<AppExtension>()
@@ -148,7 +150,54 @@ private fun Project.configAndroidApplication() = appExtension.run {
     testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
   }
 
+  signingConfigs {
+    getByName("debug") {
+      val keystoreProperties = Properties().apply {
+        load(
+          rootProject.file("keystore/debugkey.properties")
+            .apply { check(exists()) }
+            .reader()
+        )
+      }
+
+      keyAlias = keystoreProperties["keyAlias"] as String
+      keyPassword = keystoreProperties["keyPassword"] as String
+      storeFile = rootProject.file(keystoreProperties["storeFile"] as String).apply { check(exists()) }
+      storePassword = keystoreProperties["storePassword"] as String
+    }
+
+    create("release") {
+      val keystoreProperties by lazy {
+        Properties().apply {
+          load(
+            rootProject.file("keystore/debugkey.properties")
+              .apply { check(exists()) }
+              .reader()
+          )
+        }
+      }
+
+      keyAlias = getenv("keyAlias") ?: keystoreProperties["keyAlias"] as String
+      keyPassword = getenv("keyPassword") ?: keystoreProperties["keyPassword"] as String
+      storeFile = (getenv("storeFile")?.let { rootProject.file(it) }
+        ?: rootProject.file(keystoreProperties["storeFile"] as String)).apply { check(exists()) }
+      storePassword = getenv("storePassword") ?: keystoreProperties["storePassword"] as String
+
+      // Optional, specify signing versions used
+      enableV1Signing = true
+      enableV2Signing = true
+    }
+  }
+
   buildTypes {
+    getByName("debug") {
+      isMinifyEnabled = false
+      isShrinkResources = false
+
+      signingConfig = signingConfigs.getByName("debug")
+      isDebuggable = true
+    }
+
     getByName("release") {
       isMinifyEnabled = true
       isShrinkResources = true
@@ -157,6 +206,8 @@ private fun Project.configAndroidApplication() = appExtension.run {
         getDefaultProguardFile("proguard-android-optimize.txt"),
         "proguard-rules.pro"
       )
+      signingConfig = signingConfigs.getByName("release")
+      isDebuggable = false
     }
   }
 
diff --git a/keystore/debug.jks b/keystore/debug.jks
new file mode 100644
index 00000000..5dcfc30d
Binary files /dev/null and b/keystore/debug.jks differ
diff --git a/keystore/debugkey.properties b/keystore/debugkey.properties
new file mode 100644
index 00000000..c03c1ad5
--- /dev/null
+++ b/keystore/debugkey.properties
@@ -0,0 +1,4 @@
+storePassword=android
+keyPassword=android
+keyAlias=androiddebugkey
+storeFile=keystore/debug.jks
\ No newline at end of file