add doc about tiflash command line flags (#3205)

* add doc about tiflash command line flags * Small fix for format * Try fix link * Update tiflash/tiflash-command-line-flags.md Co-authored-by: Keke Yi <40977455+yikeke@users.noreply.github.com> Co-authored-by: pingcap-github-bot <sre-bot@pingcap.com>
pingcap · May 22, 2020 · 0e18ff7 · 0e18ff7
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diff --git a/tiflash/tiflash-command-line-flags.md b/tiflash/tiflash-command-line-flags.md
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+---
+title: TiFlash 命令行参数
+category: reference
+---
+
+# TiFlash 命令行参数
+
+本文介绍了 TiFlash 的命令行启动参数。
+
+## `server --config-file`
+
++ 指定 TiFlash 的配置文件路径
++ 默认：""
++ 必须指定配置文件，详细的配置项请参阅 [TiFlash 配置参数](/tiflash/tiflash-configuration.md)