message: Use /opt instead of /var/lib
diff: @@ -343,7 +343,7 @@ install_shadowbox() {
  run_step "Verifying that Docker daemon is running" verify_docker_running
  log_for_sentry "Creating Outline directory"
  - export SHADOWBOX_DIR="${SHADOWBOX_DIR:-/var/lib/outline}"
  + export SHADOWBOX_DIR="${SHADOWBOX_DIR:-/opt/outline}"
  mkdir -p --mode=770 $SHADOWBOX_DIR
  chmod u+s $SHADOWBOX_DIR
  