this looks like it does the trick - first time will issue a config procedure (I know we have redundant files in enigma-bbs-pre but that's a price for the enhanced deployment ease)

docker/bin/docker-entrypoint.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+prepopvols=("config" "mods" "art")
+bbspath=/enigma-bbs
+bbsstgp=/enigma-bbs-pre
+if [[ ! -f $bbspath/config/config.hjson ]]; then
+    for dir in "${prepopvols[@]}"
+    do
+        if [ -n "$(find "$bbspath/$dir" -maxdepth 0 -type d -empty 2>/dev/null)" ]; then
+            cp -rp $bbsstgp/$dir/* $bbspath/$dir/
+        else
+            echo "WARN skipped $bbspath/$dir - vol Not empty/not a new setup - possible bad state"
+        fi
+    done
+    ./oputil.js config new
+fi
+pm2-runtime main.js