Added jupyter-server-proxy to Dockerfile (#57)

Author: p-vdp

Dockerfile

@@ -3,7 +3,8 @@ LABEL maintainer="Qiusheng Wu"
 LABEL repo="https://github.com/opengeos/segment-geospatial"
 
 RUN mamba install -c conda-forge leafmap localtileserver segment-geospatial -y && \
-    pip install -U segment-geospatial && \
+    pip install -U segment-geospatial jupyter-server-proxy && \
+    jupyter serverextension enable --sys-prefix jupyter_server_proxy && \
     fix-permissions "${CONDA_DIR}" && \
     fix-permissions "/home/${NB_USER}"
 
@@ -19,4 +20,4 @@ ENV LOCALTILESERVER_CLIENT_PREFIX=$LOCALTILESERVER_CLIENT_PREFIX
 USER root
 RUN apt update; apt install -y libgl1
 RUN chown -R ${NB_UID} ${HOME}
-USER ${NB_USER}
+USER ${NB_USER}