Update Dockerfile

Dockerfile

@@ -69,7 +69,7 @@ RUN echo "Downloading checkpoints..." && \
 
     # ComfyUI Manager
     cd custom_nodes && git clone https://github.com/ltdrdata/ComfyUI-Manager.git ComfyUI-Manager && \
-    cd custom_nodes/ComfyUI-Manager/glob && sed -i '/def is_allowed_security_level/,/return/s/return.*/return True/' manager_server.py && \
+    cd /custom_nodes/ComfyUI-Manager/glob && sed -i '/def is_allowed_security_level/,/return/s/return.*/return True/' manager_server.py && \
 
     # Install custom nodes
     echo "Installing custom nodes..."