Copy setup/learning-environment/kind.md from en/ directory.

Author: shuuji3

content/ja/docs/setup/learning-environment/kind.md

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+---
+title: Installing Kubernetes with Kind
+weight: 40
+content_type: concept
+---
+
+<!-- overview -->
+
+Kind is a tool for running local Kubernetes clusters using Docker container "nodes".
+
+
+
+<!-- body -->
+
+## Installation
+
+See [Installing Kind](https://kind.sigs.k8s.io/docs/user/quick-start/).
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