fix: install language server for Space build

Dockerfile

@@ -16,6 +16,8 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/* \
     && git clone --depth 1 --branch "$WINDSURFAPI_REF" "$WINDSURFAPI_REPO" /app \
     && npm install --omit=dev \
+    && chmod +x /app/install-ls.sh \
+    && bash /app/install-ls.sh \
     && mkdir -p /data /opt/windsurf/data/db /tmp/windsurf-workspace
 
 EXPOSE 7860