1. Remove config from .gitignore

2. Add minimal, user-neutral config
3. Change Dockerfile to work around issues building buster on 64-bit hosts
4.  Modify export-image/prerun.sh to make sure newly created loop devices are available to mount
5. Add custom setup script 01-run.sh in stage2/04-custom-tweaks

stage2/04-custom-tweaks/01-run.sh

@@ -0,0 +1,16 @@
+#!/bin/bash -e
+
+# Install Docker using default installation script
+# and perform post-install steps to not require
+# sudo for docker commands
+echo "Installing docker..."
+on_chroot << EOF
+curl -sSL get.docker.com | sh
+usermod -aG docker ${FIRST_USER_NAME}
+EOF
+
+# Ensure ${FIRST_USER_NAME} is set up for auto-login
+echo "Setting up ${FIRST_USER_NAME} for auto-login"
+on_chroot << EOF
+	SUDO_USER="${FIRST_USER_NAME}" raspi-config nonint do_boot_behaviour B4
+EOF