fix: patch of RAGengine dockerfile (#707)

**Reason for Change**:
Change the Copy path of RAGEngine Docker file

**Requirements**

- [ ] added unit tests and e2e tests (if applicable).

**Issue Fixed**:
<!-- If this PR fixes GitHub issue 4321, add "Fixes #4321" to the next
line. -->

**Notes for Reviewers**:

Signed-off-by: Bangqi Zhu <bangqizhu@microsoft.com>
Co-authored-by: Bangqi Zhu <bangqizhu@microsoft.com>

docker/ragengine/service/Dockerfile

@@ -3,7 +3,7 @@ FROM python:3.12-slim
 WORKDIR /app
 
 # Copy all files from ragengine/services into the app/services folder
-COPY services/ services/
+COPY pkg/ragengine/services/ services/
 
 # Set the PYTHONPATH environment variable
 ENV PYTHONPATH=/app