add recursive clone

.drone.yml

@@ -1,7 +1,14 @@
 ---
 kind: pipeline
 name: deploy docs to local-it.org
+clone:
+    depth: 50
 steps:
+  - name: submodules
+    image: alpine/git
+    commands:
+    - git submodule update --init --recursive
+
   - name: build and publish image
     image: plugins/docker
     settings:
@@ -24,6 +31,7 @@ steps:
        environment:
          STACK_NAME: lit_docs
          DOMAIN: docs.local-it.org
+
 #  - name: notify
 #    image: plugins/matrix
 #    settings: