added first version of drone ci config

.drone.yml

@@ -0,0 +1,24 @@
+---
+kind: pipeline
+name: default
+
+steps:
+  - name: show directory contents
+    image: alpine
+    commands:
+      - ls
+  - name: docker bauen
+    image: plugins/docker
+    environment:
+      accesstoken:
+        from_secret: accesstoken
+    settings:
+      username: ctdo
+      password: $accesstoken
+      repo: ctdo/raumstatus
+      tags: latest
+      dry_run: true
+    when:
+      ref:
+        - refs/heads/master
+