Add '.drone.yml'

.drone.yml

@@ -0,0 +1,16 @@
+kind: pipeline
+type: docker
+name: deploy
+steps:
+  - name: push
+    image: plugins/docker
+    when:
+      branch:
+        - master
+    settings:
+      dockerfile: Dockerfile
+      repo: registry.jacknet.io/jackhadrill/games/killingfloor2
+      username: drone
+      password:
+        from_secret: password
+      registry: registry.jacknet.io