Update Dockerfile

containers/sshclient/Dockerfile

@@ -1 +1,23 @@
-
+FROM debian:bullseye-slim
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    bash \
+    screen \
+    curl \
+    wget \
+    vim \
+    nano \
+    iputils-ping \
+    ca-certificates \
+    sudo \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+RUN useradd -ms /bin/bash debian && \
+    usermod -aG sudo debian && \
+    echo 'debian ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
+RUN echo 'PS1="\u@sum:\w\$ "' >> /home/debian/.bashrc
+SHELL ["/bin/bash", "-c"]
+WORKDIR /home/debian
+USER debian
+CMD ["bash"]