build: fix frontend pipeline steps and bypass backend proxy

.drone.yml

@@ -96,6 +96,14 @@ trigger:
 
 steps:
   - name: force-init-submodules
+    image: alpine/git
+    commands:
+      - git submodule deinit --all --force
+      - git submodule sync --recursive
+      - git submodule update --init --recursive --force
+      - echo "Submodule status after forced update:"
+      - git submodule status
+  - name: build-and-publish-frontend
     image: plugins/docker
     settings:
       repo: gitea.mrixs.me/minecraft-platform/frontend