init drone: download pbf with plugin

.drone.yml

@@ -0,0 +1,23 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+trigger:
+  event:
+    - tag
+
+clone:
+  disable: true
+
+steps:
+  - name: clone
+    image: plugins/git
+    settings:
+      recursive: true
+
+  - name: download_pbf
+    image: plugins/download
+    settings:
+      source: https://download.geofabrik.de/europe/luxembourg-latest.osm.pbf
+      destination: /drone/src/pbf