Create keystore.properties before build

.drone.yml

@@ -6,10 +6,20 @@ name: Android
 steps:
 - name: build
   image: mingc/android-build-box
+  environment:
+    STOREPASSWORD:
+      from_secret: StorePassword
+    KEYPASSWORD:
+      from_secret: KeyPassword
   volumes:
   - name: deploy
     path: /tmp/deploy
   commands:
+  - touch keystore.properties
+  - storePassword=$STOREPASSWORD >> keystore.properties
+  - keyPassword=$KEYPASSWORD >> keystore.properties
+  - keyAlias=key0 >> keystore.properties
+  - storeFile=../AndroidKey >> keystore.properties
   - ./gradlew test
   - ./gradlew assembleDebug
   - ./gradlew bundleRelease