diff --git a/Dockerfile b/Dockerfile
index 6cfdcd1..5137800 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,103 @@
-FROM git.sandbox.iuk.hdm-stuttgart.de/grosse/jupyterlab-datascience:latest
+FROM python:3.10.8-slim-bullseye
+# debian:bullseye-20230109-slim
+ARG NB_USER="jovyan"
+ARG NB_UID="1000"
+ARG NB_GID="100"
 
-USER jovyan
+RUN apt-get update --yes && \
+    # - apt-get upgrade is run to patch known vulnerabilities in apt-get packages as
+    #   the ubuntu base image is rebuilt too seldom sometimes (less than once a month)
+    apt-get upgrade --yes && \
+    apt-get install --yes --no-install-recommends \
+    # - bzip2 is necessary to extract the micromamba executable.
+    bzip2 \
+    ca-certificates \
+    locales \
+    sudo \
+    nano \
+    build-essential \
+    tini \
+    wget && \
+    apt-get clean && rm -rf /var/lib/apt/lists/* && \
+    echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && \
+    locale-gen
 
-RUN conda install -c conda-forge tensorflow-gpu=2.11 -y 
\ No newline at end of file
+
+# Configure environment
+ENV CONDA_DIR=/opt/conda \
+    SHELL=/bin/bash \
+    NB_USER="${NB_USER}" \
+    NB_UID=${NB_UID} \
+    NB_GID=${NB_GID} \
+    LC_ALL=en_US.UTF-8 \
+    LANG=en_US.UTF-8 \
+    LANGUAGE=en_US.UTF-8
+ENV PATH="${CONDA_DIR}/bin:${PATH}" \
+    HOME="/home/${NB_USER}"
+
+# Copy a script that we will use to correct permissions after running certain commands
+COPY fix-permissions /usr/local/bin/fix-permissions
+RUN chmod a+rx /usr/local/bin/fix-permissions
+
+# Enable prompt color in the skeleton .bashrc before creating the default NB_USER
+# hadolint ignore=SC2016
+RUN sed -i 's/^#force_color_prompt=yes/force_color_prompt=yes/' /etc/skel/.bashrc && \
+   # Add call to conda init script see https://stackoverflow.com/a/58081608/4413446
+   echo 'eval "$(command conda shell.bash hook 2> /dev/null)"' >> /etc/skel/.bashrc
+
+# Create NB_USER with name jovyan user with UID=1000 and in the 'users' group
+# and make sure these dirs are writable by the `users` group.
+RUN echo "auth requisite pam_deny.so" >> /etc/pam.d/su && \
+    sed -i.bak -e 's/^%admin/#%admin/' /etc/sudoers && \
+    sed -i.bak -e 's/^%sudo/#%sudo/' /etc/sudoers && \
+    useradd -l -m -s /bin/bash -N -u "${NB_UID}" "${NB_USER}" && \
+    mkdir -p "${CONDA_DIR}" && \
+    chown "${NB_USER}:${NB_GID}" "${CONDA_DIR}" && \
+    chmod g+w /etc/passwd && \
+    fix-permissions "${HOME}" && \
+    fix-permissions "${CONDA_DIR}"
+
+USER ${NB_UID}
+
+# Pin python version here, or set it to "default"
+ARG PYTHON_VERSION=3.10
+
+# Setup work directory for backward-compatibility
+RUN mkdir "/home/${NB_USER}/work" && \
+    fix-permissions "/home/${NB_USER}"
+
+COPY --chown="${NB_UID}:${NB_GID}" initial-condarc "${CONDA_DIR}/.condarc"
+WORKDIR /tmp
+RUN set -x && \
+    arch=$(uname -m) && \
+    if [ "${arch}" = "x86_64" ]; then \
+        # Should be simpler, see <https://github.com/mamba-org/mamba/issues/1437>
+        arch="64"; \
+    fi && \
+    wget -qO /tmp/micromamba.tar.bz2 \
+        "https://micromamba.snakepit.net/api/micromamba/linux-${arch}/latest" && \
+    tar -xvjf /tmp/micromamba.tar.bz2 --strip-components=1 bin/micromamba && \
+    rm /tmp/micromamba.tar.bz2 && \
+    PYTHON_SPECIFIER="python=${PYTHON_VERSION}" && \
+    if [[ "${PYTHON_VERSION}" == "default" ]]; then PYTHON_SPECIFIER="python"; fi && \
+    # Install the packages
+    ./micromamba install \
+        --root-prefix="${CONDA_DIR}" \
+        --prefix="${CONDA_DIR}" \
+        --yes \
+        "${PYTHON_SPECIFIER}" \
+        'mamba' \
+        'jupyter_core' && \
+    rm micromamba && \
+    # Pin major.minor version of python
+    mamba list python | grep '^python ' | tr -s ' ' | cut -d ' ' -f 1,2 >> "${CONDA_DIR}/conda-meta/pinned" && \
+    mamba clean --all -f -y && \
+    fix-permissions "${CONDA_DIR}" && \
+    fix-permissions "/home/${NB_USER}"
+
+#RUN conda update --all --yes
+#RUN conda install -c conda-forge tensorflow-gpu=2.11 -y 
+
+#RUN CONDA_CUDA_OVERRIDE="11.2" mamba install --yes -c conda-forge tensorflow==2.10.0=cuda112py310*
+ENV CONDA_CUDA_OVERRIDE="11.2"
+RUN mamba install -y -c conda-forge tensorflow-gpu
diff --git a/old/fix-permissions b/fix-permissions
similarity index 100%
rename from old/fix-permissions
rename to fix-permissions
diff --git a/old/initial-condarc b/initial-condarc
similarity index 100%
rename from old/initial-condarc
rename to initial-condarc
diff --git a/old/jupyter_server_config.py b/jupyter_server_config.py
similarity index 100%
rename from old/jupyter_server_config.py
rename to jupyter_server_config.py
diff --git a/old/start-notebook.sh b/start-notebook.sh
similarity index 100%
rename from old/start-notebook.sh
rename to start-notebook.sh
diff --git a/old/start-singleuser.sh b/start-singleuser.sh
similarity index 100%
rename from old/start-singleuser.sh
rename to start-singleuser.sh