Add docker socket linking to building container

.drone.yml

@@ -9,6 +9,9 @@ platform:
 steps:
   - name: deployment
     image: alpine
+    volumes:
+    - name: host_docker_socket
+      path: /var/run/docker.sock
     commands:
     - echo "Setting up internal docker cli"
     - apk update && apk add docker docker-compose
@@ -20,6 +23,11 @@ steps:
       branch:
       - ci-testing
 
+volumes:
+  - name: host_docker_socket
+    host:
+      path: /var/run/docker.sock
+
 node:
   host: socrates