Update drone for dockerized gitea

.drone.yml

@@ -2,12 +2,15 @@ kind: pipeline
 name: default
 
 clone:
-  git:
+  disable: true
-    image: alpine/git
-    lfs: true
-    depth: 0
 
 steps:
+  - name: clone
+    image: alpine/git
+    commands:
+      - git lfs install
+      - git clone http://gitea:3000/ipng/ipng.ch.git .
+      - git checkout $DRONE_COMMIT
   - name: hugo
     image: git.ipng.ch/ipng/drone-hugo:release-0.148.2
     settings: