Update Dockerfile

Dockerfile

@@ -7,11 +7,15 @@ COPY ./api.py /code/api.py
 COPY ./json_parser.py /code/json_parser.py
 COPY ./logger_config.py /code/logger_config.py
 COPY ./response_formatter.py /code/response_formatter.py
+COPY ./dify_client_python /code/dify_client_python
 
 RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
+WORKDIR /code/dify_client_python
 RUN pip install -e .
 
+WORKDIR /code
+
 EXPOSE 7860
 
 CMD ["uvicorn", "api:app", "--host", "0.0.0.0", "--port", "7860"]