Add start_server_managed.sh wrapper

start_server_managed.sh

@@ -0,0 +1,14 @@
+cat > "${VALHEIMDIR}/start_server_managed.sh" << 'EOF'
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Forward environment variables into the BepInEx launcher
+exec ./start_server_bepinex.sh \
+  -name "${SERVER_NAME}" \
+  -port 2456 \
+  -world "${WORLD_NAME}" \
+  -password "${SERVER_PASSWORD}" \
+  -public "${PUBLIC}"
+EOF
+
+chmod +x "${VALHEIMDIR}/start_server_managed.sh"