SEARXNG_MCP_BASE_URL=http://host.docker.internal:8890 SEARXNG_MCP_FALLBACK_BASE_URLS= SEARXNG_MCP_PUBLISH_PORT=8811 SEARXNG_MCP_FETCH_VERIFY_TLS=1 SEARXNG_MCP_SEARCH_CONCURRENCY=6 SEARXNG_MCP_FETCH_CONCURRENCY=3 SEARXNG_MCP_RENDER_CONCURRENCY=2 SEARXNG_MCP_RENDER_AUTO_FALLBACK=1