ok this seems to work

docker-entrypoint.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Start PostgreSQL service
+service postgresql start
+
+# Wait for PostgreSQL to be ready
+until su - postgres -c "pg_isready"; do
+  echo "Waiting for PostgreSQL to be ready..."
+  sleep 1
+done
+
+# Create the database and user if they don't exist
+su - postgres -c "psql -tc \"SELECT 1 FROM pg_roles WHERE rolname = '$POSTGRES_USER';\"" | grep -q 1 || \
+su - postgres -c "psql -c \"CREATE USER $POSTGRES_USER WITH ENCRYPTED PASSWORD '$POSTGRES_PASSWORD';\""
+
+su - postgres -c "psql -tc \"SELECT 1 FROM pg_database WHERE datname = '$POSTGRES_DB';\"" | grep -q 1 || \
+su - postgres -c "psql -c \"CREATE DATABASE $POSTGRES_DB OWNER $POSTGRES_USER;\""
+
+# Start Caddy
+caddy run --config /etc/caddy/Caddyfile &
+
+# Start Express app
+npm start
+
+# Keep container running
+wait