feat: add Docker Sandboxes announcement to README

Replace the Agent Swarms / Claude Code lines at the top with a
prominent Docker Sandboxes announcement section including install
commands and a link to the blog post.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -12,9 +12,23 @@
   <a href="https://discord.gg/VDdww8qS42"><img src="https://img.shields.io/discord/1470188214710046894?label=Discord&logo=discord&v=2" alt="Discord" valign="middle"></a>&nbsp; • &nbsp;
   <a href="repo-tokens"><img src="repo-tokens/badge.svg" alt="34.9k tokens, 17% of context window" valign="middle"></a>
 </p>
-Using Claude Code, NanoClaw can dynamically rewrite its code to customize its feature set for your needs.
 
-**New:** First AI assistant to support [Agent Swarms](https://code.claude.com/docs/en/agent-teams). Spin up teams of agents that collaborate in your chat.
+<div align="center">
+<br>
+<h2>🐳 Now Running in Docker Sandboxes</h2>
+<p>Every agent gets its own isolated container inside a micro VM.<br>Hypervisor-level isolation. Millisecond startup. No complex setup.</p>
+
+```bash
+# macOS (Apple Silicon)
+curl -fsSL https://nanoclaw.dev/install-docker-sandboxes.sh | bash
+
+# Windows (WSL)
+curl -fsSL https://nanoclaw.dev/install-docker-sandboxes-windows.sh | bash
+```
+
+<p><a href="https://nanoclaw.dev/blog/nanoclaw-docker-sandboxes">Read the announcement →</a></p>
+<br>
+</div>
 
 ## Why I Built NanoClaw
 
@@ -70,8 +84,8 @@ Then run `/setup`. Claude Code handles everything: dependencies, authentication,
 - **Main channel** - Your private channel (self-chat) for admin control; every group is completely isolated
 - **Scheduled tasks** - Recurring jobs that run Claude and can message you back
 - **Web access** - Search and fetch content from the Web
-- **Container isolation** - Agents are sandboxed in Apple Container (macOS) or Docker (macOS/Linux)
-- **Agent Swarms** - Spin up teams of specialized agents that collaborate on complex tasks. NanoClaw is the first personal AI assistant to support agent swarms.
+- **Container isolation** - Agents are sandboxed in [Docker Sandboxes](https://nanoclaw.dev/blog/nanoclaw-docker-sandboxes) (micro VM isolation), Apple Container (macOS), or Docker (macOS/Linux)
+- **Agent Swarms** - Spin up teams of specialized agents that collaborate on complex tasks
 - **Optional integrations** - Add Gmail (`/add-gmail`) and more via skills
 
 ## Usage