docs: add _index.md (#12)

Co-authored-by: liukj <[email protected]>

Author: liukuijun666

docs/content.en/_index.md

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+---
+weight: 10
+title: INFINI Agent
+bookCollapseSection: true
+---
+
+# INFINI Agent
+
+## Introduction
+
+**INFINI Agent** is used for collecting and uploading the logs and metric information of Elasticsearch, Easysearch, and Opensearch clusters. It is managed through INFINI Console, supports mainstream operating systems and platforms. The installation package is lightweight and has no external dependencies, enabling quick and convenient installation.
+
+## Features
+
+- Collect and upload health information of Elasticsearch and other clusters, as well as cluster stats, index stats, and node stats information.
+- Collect and upload the logs of instance nodes such as Elasticsearch.
+- Collect and upload host metric information.
+
+{{< button relref="../docs/getting-started/install/" >}}Getting Started Now{{< /button >}}
+
+## Community
+
+Fell free to join the Discord server to discuss anything around this project:
+
+[Discord Server](https://discord.gg/4tKTMkkvVX)
+
+## Who Is Using?
+
+If you are using INFINI Agent and feel it pretty good, please [let us know](https://discord.gg/4tKTMkkvVX). Thank you for your support.

docs/content.zh/_index.md

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+---
+weight: 10
+title: INFINI Agent
+bookCollapseSection: true
+---
+
+# INFINI Agent
+
+## 介绍
+
+**INFINI Agent** 负责采集和上传 Elasticsearch, Easysearch, Opensearch 集群的日志和指标信息，通过 INFINI Console 管理，支持主流操作系统和平台，安装包轻量且无任何外部依赖，可以快速方便地安装。
+
+## 特性
+
+- 采集上传 Elasticsearch 等集群健康信息/集群 stats/索引 stats/节点 stats 信息
+- 采集上传 Elasticsearch 等实例节点日志
+- 采集主机指标信息
+
+{{< button relref="../docs/getting-started/install/" >}}即刻开始{{< /button >}}
+
+## 社区
+
+[加入我们的 Discord](https://discord.gg/4tKTMkkvVX)
+
+## 谁在用?
+
+如果您正在使用 INFINI Agent，并且您觉得它还不错的话，请[告诉我们](https://discord.gg/4tKTMkkvVX)，感谢您的支持。