update drone

.drone.yml

@@ -22,6 +22,9 @@ steps:
       - mv target/webssh.war /home/wars/
   - name: restart
     image: docker
+    volumes:
+      - name: docker-dir
+        path: /var/run/docker.sock
     commands:
       - docker restart laughing_murdock
 
@@ -32,6 +35,9 @@ volumes:
   - name: maven-dir
     host:
       path: /home/ww/m2/repository
+  - name: docker-dir
+    host:
+      path: /var/run/docker.sock
 
 trigger:
   branch: