latest, seems to sort of work

Dockerfile

@@ -11,4 +11,9 @@ RUN bash /tmp/run.sh && rm /tmp/run.sh
 RUN rm -f /etc/service/sshd/down
 
 #cleanup
-RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+RUN apt-get clean && \
+    rm -rf \
+        /var/lib/apt/lists/* \
+        /tmp/* \
+        /var/tmp/* \
+        /etc/ssh/ssh_host_*_key

Makefile

@@ -4,9 +4,4 @@ BRANCH := $(shell git branch | sed -n -e 's/^\* \(.*\)/\1/p')
 default: build
 
 build:
-	script -q ./build.log docker build --no-cache -t sneak/sandbox .
-	docker tag sneak/sandbox sneak/sandbox:$(YYYYMMDD)
-
-push:
-	docker push sneak/sandbox
-	docker push sneak/sandbox:$(YYYYMMDD)
+	script -q ./build.log docker build --no-cache -t sneak/sandbox:$(YYYYMMDD) .

run.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 export DEBIAN_FRONTEND=noninteractive
 
+USERNAME="sneak"
+
 set -x
 set -e
 exec 1> >(tee -a /var/log/sandboxbuild.log) 2>&1
@@ -25,6 +27,7 @@ PKGS="
     default-jre
     diffstat
     dnsutils
+    docker.io
     dos2unix
     editorconfig
     ffmpeg
@@ -125,10 +128,26 @@ apt update
 apt install -y neovim
 
 mkdir -p /etc/bashrc.d
-cat >> /etc/skel/.bashrc <<'EOF'
+mkdir -p /etc/profile.d
+
+cat >> /etc/bash.bashrc <<'EOF'
+if ! shopt -oq posix; then
+    if [ -f /usr/share/bash-completion/bash_completion ]; then
+        . /usr/share/bash-completion/bash_completion
+    elif [ -f /etc/bash_completion ]; then
+        . /etc/bash_completion
+    fi
+fi
+
 for FN in /etc/bashrc.d/*.sh; do
     source "$FN"
 done
+
+if ! shopt -oq posix; then
+    for FN in /etc/profile.d/*.sh; do
+        source "$FN"
+    done
+fi
 EOF
 
 ################################################################################
@@ -138,7 +157,9 @@ EOF
 export NVM_DIR='/usr/local/nvm'
 mkdir -p "$NVM_DIR"
 curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/install.sh | bash
-echo 'source /usr/local/nvm/nvm.sh' > /etc/bashrc.d/100.nvm.sh
+cat > /etc/bashrc.d/100.nvm.sh <<'EOF'
+source /usr/local/nvm/nvm.sh
+EOF
 source /etc/bashrc.d/100.nvm.sh
 
 nvm install node
@@ -206,3 +227,11 @@ PIP_PKGS="
 for PKG in $PIP_PKGS; do
     pip3 install $PKG
 done
+
+################################################################################
+## add working user and add to sudo nopassword
+################################################################################
+groupadd -g 1000 $USERNAME
+useradd -u 1000 -g 1000 -s /bin/bash $USERNAME
+usermod -p '*' $USERNAME
+echo "$USERNAME ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers