build fix.

Author: RubelMozumder

docker/Dockerfile.jupyter

@@ -3,7 +3,8 @@ ARG UV_VERSION=0.9
 ARG PLUGIN_NAME="PLUGIN"
 ARG PYTHON_VERSION=3.12
 ARG SETUPTOOLS_SCM_PRETEND_VERSION_FOR_PYNXTOOLS_SPM="0.0.0+0.gunknown"
-ARG EXAMPLES_DIR="./src/test_north/north_tools/spm_jupyter/examples"
+# path relative to the build context
+ARG EXAMPLES_DIR="src/pynxtools_spm/north_tools/spm_jupyter/examples"
 FROM ghcr.io/astral-sh/uv:${UV_VERSION} AS uv_stage
 
 FROM quay.io/jupyter/scipy-notebook:${JUPYTER_TAG} AS scipy_notebook