added dummy debug keystore

android/app/build.gradle

@@ -19,11 +19,23 @@ android {
         }
     }
 
+    signingConfigs {
+        debug {
+            storeFile file("debug.keystore")
+            storePassword "android"
+            keyAlias "androiddebugkey"
+            keyPassword "android"
+        }
+    }
+
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt')
         }
+        debug {
+            signingConfig signingConfigs.debug
+        }
     }
 
     externalNativeBuild {