Adjust Dockerfile and pipeline.

.drone.yml

@@ -21,7 +21,8 @@ steps:
   - name: deploy
     image: alpine
     volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
+      - name: dockersock
+        path: /var/run/docker.sock
     environment:
       DOCKER_USERNAME:
         from_secret: DOCKER_USERNAME
@@ -33,4 +34,10 @@ steps:
       - docker pull registry.binderlab.io/harbormaster:latest
       - docker stop harbormaster || true
       - docker rm harbormaster || true
-      - docker run -d --name harbormaster -p 8080:8080 registry.binderlab.io/harbormaster:latest
+      - docker run -d --name harbormaster -p 8080:8080 registry.binderlab.io/harbormaster:latest
+
+
+volumes:
+- name: dockersock
+  host:
+    path: /var/run/docker.sock