fix: replace build_bee_debug with proper apkovl mechanism for Alpine LiveCD

- genapkovl-bee_debug.sh: creates apkovl tarball with overlay files,
  /etc/apk/world package list, runlevel symlinks, dropbear config
- mkimg.bee_debug.sh: set hostname/apkovl, remove invalid build_bee_debug

iso/builder/genapkovl-bee_debug.sh

@@ -0,0 +1,112 @@
+#!/bin/sh -e
+# genapkovl-bee_debug.sh — generate apkovl for bee debug LiveCD
+# Called by mkimage.sh: receives hostname as , must create .apkovl.tar.gz
+
+HOSTNAME="$1"
+if [ -z "$HOSTNAME" ]; then
+    echo "usage: $0 hostname"
+    exit 1
+fi
+
+OVERLAY="${BEE_OVERLAY_DIR}"
+if [ -z "$OVERLAY" ]; then
+    echo "ERROR: BEE_OVERLAY_DIR not set"
+    exit 1
+fi
+
+cleanup() { rm -rf "$tmp"; }
+tmp="$(mktemp -d)"
+trap cleanup EXIT
+
+makefile() {
+    OWNER="$1" PERMS="$2" FILENAME="$3"
+    cat > "$FILENAME"
+    chown "$OWNER" "$FILENAME"
+    chmod "$PERMS" "$FILENAME"
+}
+
+rc_add() {
+    mkdir -p "$tmp/etc/runlevels/$2"
+    ln -sf /etc/init.d/"$1" "$tmp/etc/runlevels/$2/$1"
+}
+
+# --- hostname ---
+mkdir -p "$tmp/etc"
+makefile root:root 0644 "$tmp/etc/hostname" <<EOF
+$HOSTNAME
+EOF
+
+# --- packages to install at boot ---
+mkdir -p "$tmp/etc/apk"
+makefile root:root 0644 "$tmp/etc/apk/world" <<EOF
+alpine-base
+dmidecode
+smartmontools
+nvme-cli
+pciutils
+ipmitool
+util-linux
+lsblk
+e2fsprogs
+lshw
+dropbear
+libqrencode-tools
+tzdata
+ca-certificates
+strace
+procps
+lsof
+file
+less
+vim
+EOF
+
+# --- standard sysinit/boot/shutdown services ---
+rc_add devfs sysinit
+rc_add dmesg sysinit
+rc_add mdev sysinit
+rc_add hwdrivers sysinit
+rc_add modloop sysinit
+
+rc_add hwclock boot
+rc_add modules boot
+rc_add sysctl boot
+rc_add hostname boot
+rc_add bootmisc boot
+rc_add syslog boot
+
+rc_add mount-ro shutdown
+rc_add killprocs shutdown
+rc_add savecache shutdown
+
+# --- bee services ---
+for svc in bee-sshsetup bee-network dropbear bee-audit-debug; do
+    rc_add "$svc" default
+done
+
+# --- copy overlay etc/ (init.d scripts, motd, etc.) ---
+if [ -d "$OVERLAY/etc" ]; then
+    cp -r "$OVERLAY/etc/." "$tmp/etc/"
+fi
+
+# --- copy overlay usr/ (bee-network.sh, audit binary) ---
+if [ -d "$OVERLAY/usr" ]; then
+    mkdir -p "$tmp/usr"
+    cp -r "$OVERLAY/usr/." "$tmp/usr/"
+fi
+
+# --- copy root/.ssh/authorized_keys if present ---
+if [ -d "$OVERLAY/root" ]; then
+    mkdir -p "$tmp/root"
+    cp -r "$OVERLAY/root/." "$tmp/root/"
+    chmod 700 "$tmp/root/.ssh" 2>/dev/null || true
+    chmod 600 "$tmp/root/.ssh/authorized_keys" 2>/dev/null || true
+fi
+
+# --- dropbear: enable root login ---
+mkdir -p "$tmp/etc/dropbear" "$tmp/etc/conf.d"
+makefile root:root 0644 "$tmp/etc/conf.d/dropbear" <<EOF
+DROPBEAR_OPTS="-R"
+EOF
+
+tar -c -C "$tmp" etc usr root 2>/dev/null | gzip -9n > "$HOSTNAME.apkovl.tar.gz"