fix: dify-web docker MAX_TOOLS_NUM environment value not work (#16241)

web/docker/entrypoint.sh

@@ -27,5 +27,6 @@ export NEXT_PUBLIC_TEXT_GENERATION_TIMEOUT_MS=${TEXT_GENERATION_TIMEOUT_MS}
 export NEXT_PUBLIC_CSP_WHITELIST=${CSP_WHITELIST}
 export NEXT_PUBLIC_TOP_K_MAX_VALUE=${TOP_K_MAX_VALUE}
 export NEXT_PUBLIC_INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH=${INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH}
+export NEXT_PUBLIC_MAX_TOOLS_NUM=${MAX_TOOLS_NUM}
 
 pm2 start /app/web/server.js --name dify-web --cwd /app/web -i ${PM2_INSTANCES} --no-daemon