updates b uild process for new drone version

.drone.yml

@@ -1,13 +1,20 @@
-pipeline:
+kind: pipeline
-  docker:
+name: default
+
+steps:
+  - name: docker
     image: plugins/docker
+    settings:
       repo: phaefelfinger/tv7playlist
       tags:
         - latest
-      - 2.0
+        - '3.0'
-      - 2.0.1
+        - '3.0.0'
-    secrets: [ docker_username, docker_password ]
+      username:
-    debug: true
+        from_secret: docker_username
-    when:
+      password:
-      event: push
+        from_secret: docker_password
-      branch: master
+
+trigger:
+  branch:
+    - master