Fixing docker publishing

.drone.yml

@@ -10,10 +10,11 @@ steps:
   image: hseeberger/scala-sbt:11.0.2_2.12.8_1.2.8
   commands:
   - sbt test
-- name: dockerfile
+- name: docker:stage
   image: hseeberger/scala-sbt:11.0.2_2.12.8_1.2.8
   commands:
   - sbt docker:stage
+  - mv target/docker/stage/* .
 - name: docker:publish
   image: plugins/docker
   settings:

.sbtopts

@@ -0,0 +1 @@
+-mem 2048