added documentation setup instructions

docs/5-docs/1-overview.md

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+# Overview

docs/5-docs/2-setting-up.md

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+# Setting Up
+
+## Steps
+
+### Local
+
+1. Install node.js and yarn.
+
+2. Clone the [documentation repository](https://github.com/llama-bot/llama-bot-docs).
+
+   ```bash
+   git clone https://github.com/llama-bot/llama-bot-docs
+   ```
+
+3. Install dependencies.
+
+   ```bash
+   yarn install
+   ```
+
+4. Test locally. Live edit is supported.
+
+   ```bash
+   yarn start
+   ```
+
+### Deployment
+
+1. Follow the [instructions from docusaurus](https://docusaurus.io/docs/deployment#deploying-to-github-pages)

docs/5-docs/_category_.json

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+{
+  "label": "Docs",
+  "position": 5
+}