Minimalize singleuser-sample

Author: consideRatio

images/singleuser-sample/Dockerfile

@@ -3,40 +3,33 @@ FROM python:3.9-slim-bullseye
 # VULN_SCAN_TIME=
 
 ENV DEBIAN_FRONTEND=noninteractive \
-    LANG=en_US.UTF-8 \
-    LC_ALL=en_US.UTF-8 \
-    LANGUAGE=en_US.UTF-8 \
     NB_USER=jovyan \
     NB_UID=1000 \
     HOME=/home/jovyan
 
+RUN adduser --disabled-password \
+        --gecos "Default user" \
+        --uid ${NB_UID} \
+        --home ${HOME} \
+        --force-badname \
+        ${NB_USER}
+
 RUN apt-get update \
  && apt-get upgrade -y \
  && apt-get install -y --no-install-recommends \
         ca-certificates \
         dnsutils \
         git \
-        locales \
         iputils-ping \
         tini \
- && rm -rf /var/lib/apt/lists/* \
- && echo "en_US.UTF-8 UTF-8" > /etc/locale.gen \
- && locale-gen
-
-RUN adduser --disabled-password \
-        --gecos "Default user" \
-        --uid ${NB_UID} \
-        --home ${HOME} \
-        --force-badname \
-        ${NB_USER}
-
-USER $NB_USER
+ && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt /tmp/requirements.txt
 RUN pip install --no-cache-dir -r /tmp/requirements.txt
 
-# nbgitpuller is installed in requirements.txt for demo purposes, and this
-# enables it to function.
-RUN jupyter serverextension enable --py nbgitpuller --sys-prefix
+WORKDIR ${HOME}
+USER ${NB_USER}
 
+EXPOSE 8888
 ENTRYPOINT ["tini", "--"]
+CMD ["jupyter", "lab"]