update pipeline for master branch

.drone.yml

@@ -11,7 +11,7 @@ volumes:
       path: /var/lib/cache
 steps:
 - name: maven
-  image: maven:3-jdk-10
+  image: maven:3-jdk-8
   volumes:
     - name: cache 
       path: /root/.m2 
@@ -37,7 +37,7 @@ steps:
     port: 22
     script:
       - chmod +x /home/deploy.sh
-      - nohup bash /home/deploy.sh & 
+      - nohup bash /home/deploy.sh &
 trigger:
   branch:
   - master