try dockerfile path from root

.github/composite/deploy-cloudflare/action.yaml

@@ -97,11 +97,6 @@ runs:
         #   run: |
         #       bun run ./packages/gitbook-v2/openNext/customWorkers/script/updateWrangler.ts ${{ steps.extract_server_version_id.outputs.version_id }}
 
-        - name: Copy server functions to custom workers
-          shell: bash
-          run: |
-            cp -r ./packages/gitbook-v2/.open-next/server-functions/default ./packages/gitbook-v2/openNext/customWorkers/default
-
         - id: deploy_container
           name: Deploy container to Cloudflare
           uses: cloudflare/wrangler-action@v3.14.0

packages/gitbook-v2/openNext/customWorkers/containerWrangler.jsonc

@@ -9,7 +9,7 @@
     "containers": [
         {
             "class_name": "OpenNextContainer",
-            "image": "./default/Dockerfile",
+            "image": "./packages/gitbook-v2/.open-next/server-functions/default/Dockerfile",
             "max_instances": 1,
             "name": "container-open-next"
         }