Updating build context path

Dockerfile

@@ -64,12 +64,12 @@ USER root
 
 # User Debian packages
 ## Security warning : Potential user code executed as root (build time)
-RUN --mount=target=/root/packages.txt,source=packages.txt \
+RUN --mount=target=/root/packages.txt,source=jupyterlab/packages.txt \
     apt-get update && \
     xargs -r -a /root/packages.txt apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
-RUN --mount=target=/root/on_startup.sh,source=on_startup.sh,readwrite \
+RUN --mount=target=/root/on_startup.sh,source=jupyterlab/on_startup.sh,readwrite \
 	bash /root/on_startup.sh
 
 RUN mkdir /data && chown user:user /data
@@ -81,7 +81,7 @@ RUN mkdir /data && chown user:user /data
 USER user
 
 # Python packages
-RUN --mount=target=requirements.txt,source=requirements.txt \
+RUN --mount=target=requirements.txt,source=jupyterlab/requirements.txt \
     pip install --no-cache-dir --upgrade -r requirements.txt
 
 RUN chmod +x start_server.sh