diff --git a/README.md b/README.md
index fa9490d..e5fdc37 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,23 @@ Configure webhooks to receive alerts or reports in your team chat apps.
 Built-in utility to provide the agent with the current system time, ensuring accurate handling of relative time requests.
 - **Usage**: "What's the date today?" or "Remind me to check the logs next Monday."
 
+## Docker Support
+
+### Chinese Font Issues in Screenshots
+When running AutoClaw inside a Docker container (especially Alpine or Debian Slim), screenshots of Chinese websites may display text as square boxes ("tofu") due to missing fonts.
+
+**Solution:** Install CJK (Chinese/Japanese/Korean) fonts in your container.
+
+**For Debian/Ubuntu:**
+```bash
+apt-get update && apt-get install -y fonts-noto-cjk fonts-wqy-zenhei
+```
+
+**For Alpine Linux:**
+```bash
+apk add font-noto-cjk
+```
+
 ## License
 
 MIT
diff --git a/src/tools/screenshot.ts b/src/tools/screenshot.ts
index 93efda8..208ca83 100644
--- a/src/tools/screenshot.ts
+++ b/src/tools/screenshot.ts
@@ -64,6 +64,9 @@ export const ScreenshotTool: ToolModule = {
         await page.goto(args.url, { waitUntil: 'networkidle', timeout: 30000 });
         
         // Inject CSS to force common Chinese fonts
+        // Note: For Docker environments (Alpine/Debian), ensure fonts are installed.
+        // Alpine: apk add font-noto-cjk
+        // Debian/Ubuntu: apt-get install fonts-noto-cjk fonts-wqy-zenhei
         await page.addStyleTag({
           content: `
             body, h1, h2, h3, h4, h5, h6, p, span, div, li, a, button, input, textarea {