Update version to 0.6.0 and add breaking change warning

Update all documentation to reflect v0.6.0 release with image variants:

- Update version numbers from 0.3.3 to 0.6.0 throughout docs
- Add prominent breaking change callout in Dockerfile reference
- Clarify that Python is only in -python variant starting v0.6.0

This completes the documentation sync for PR #259.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: github-actions[bot]

src/content/docs/sandbox/concepts/preview-urls.mdx

@@ -210,7 +210,7 @@ For custom domain issues, see [Production Deployment troubleshooting](/sandbox/g
 When using `wrangler dev`, you must expose ports in your Dockerfile:
 
 ```dockerfile
-FROM docker.io/cloudflare/sandbox:0.3.3
+FROM docker.io/cloudflare/sandbox:0.6.0
 
 # Required for local development
 EXPOSE 3000

src/content/docs/sandbox/concepts/sandboxes.mdx

@@ -144,10 +144,10 @@ The SDK automatically checks that your npm package version matches the Docker co
 - You updated the npm package (`npm install @cloudflare/sandbox@latest`) but forgot to update the `FROM` line in your Dockerfile
 
 **How to fix**:
-Update your Dockerfile to match your npm package version. For example, if using `@cloudflare/sandbox@0.3.3`:
+Update your Dockerfile to match your npm package version. For example, if using `@cloudflare/sandbox@0.6.0`:
 
 ```dockerfile
-FROM docker.io/cloudflare/sandbox:0.3.3  # Match your npm version
+FROM docker.io/cloudflare/sandbox:0.6.0  # Match your npm version
 ```
 
 See [Dockerfile reference](/sandbox/configuration/dockerfile/) for details on extending the base image.

src/content/docs/sandbox/configuration/dockerfile.mdx

@@ -16,7 +16,7 @@ The Sandbox SDK provides two container image variants optimized for different wo
 Optimized for shell commands and JavaScript/TypeScript execution:
 
 ```dockerfile
-FROM docker.io/cloudflare/sandbox:0.3.3
+FROM docker.io/cloudflare/sandbox:0.6.0
 ```
 
 **What's included:**
@@ -39,7 +39,7 @@ FROM docker.io/cloudflare/sandbox:0.3.3
 Includes Python 3.11 and data science packages for Python code execution:
 
 ```dockerfile
-FROM docker.io/cloudflare/sandbox:0.3.3-python
+FROM docker.io/cloudflare/sandbox:0.6.0-python
 ```
 
 **What's included:**
@@ -55,11 +55,21 @@ FROM docker.io/cloudflare/sandbox:0.3.3-python
 - Running Python scripts with data science libraries
 - Executing AI-generated Python code
 
+:::caution[Breaking change in v0.6.0]
+Starting with v0.6.0, Python is only included in the `-python` image variant. If you use Python code execution (via `runCode()` or direct `exec()` calls), you must update your Dockerfile:
+
+```dockerfile
+FROM docker.io/cloudflare/sandbox:0.6.0-python
+```
+
+The default image no longer includes Python to reduce image size for users who do not need it.
+:::
+
 :::caution[Version synchronization required]
-Always match the Docker image version to your npm package version. If you're using `@cloudflare/sandbox@0.3.3`, use one of these base images:
+Always match the Docker image version to your npm package version. If you're using `@cloudflare/sandbox@0.6.0`, use one of these base images:
 
-- `docker.io/cloudflare/sandbox:0.3.3` (default, no Python)
-- `docker.io/cloudflare/sandbox:0.3.3-python` (with Python)
+- `docker.io/cloudflare/sandbox:0.6.0` (default, no Python)
+- `docker.io/cloudflare/sandbox:0.6.0-python` (with Python)
 
 **Why this matters**: The SDK automatically checks version compatibility on startup. Mismatched versions can cause features to break or behave unexpectedly. If versions don't match, you'll see warnings in your logs.
 
@@ -73,7 +83,7 @@ Create a `Dockerfile` in your project root to extend either base image:
 ### Extending the default image
 
 ```dockerfile title="Dockerfile"
-FROM docker.io/cloudflare/sandbox:0.3.3
+FROM docker.io/cloudflare/sandbox:0.6.0
 
 # Install Node.js packages globally
 RUN npm install -g typescript ts-node prettier
@@ -88,7 +98,7 @@ RUN apt-get update && apt-get install -y \
 ### Extending the Python image
 
 ```dockerfile title="Dockerfile"
-FROM docker.io/cloudflare/sandbox:0.3.3-python
+FROM docker.io/cloudflare/sandbox:0.6.0-python
 
 # Install additional Python packages
 RUN pip install --no-cache-dir \
@@ -127,10 +137,10 @@ Run services automatically when the container starts by creating a custom startu
 
 ```dockerfile title="Dockerfile"
 # Use default image for Node.js-only services
-FROM docker.io/cloudflare/sandbox:0.3.3
+FROM docker.io/cloudflare/sandbox:0.6.0
 
 # Or use Python image if your startup script needs Python
-# FROM docker.io/cloudflare/sandbox:0.3.3-python
+# FROM docker.io/cloudflare/sandbox:0.6.0-python
 
 COPY my-app.js /workspace/my-app.js
 COPY startup.sh /workspace/startup.sh

src/content/docs/sandbox/guides/code-execution.mdx

@@ -14,7 +14,7 @@ This guide shows you how to execute Python and JavaScript code with rich outputs
 To use Python with the Code Interpreter API, your Dockerfile must use the `-python` image variant:
 
 ```dockerfile
-FROM docker.io/cloudflare/sandbox:0.3.3-python
+FROM docker.io/cloudflare/sandbox:0.6.0-python
 ```
 
 The default image (without `-python` suffix) does not include Python. See [Dockerfile reference](/sandbox/configuration/dockerfile/) for details on image variants.

src/content/docs/sandbox/guides/expose-services.mdx

@@ -234,7 +234,7 @@ for (const port of [3000, 5173, 8080]) {
 When developing locally with `wrangler dev`, you must expose ports in your Dockerfile:
 
 ```dockerfile title="Dockerfile"
-FROM docker.io/cloudflare/sandbox:0.3.3
+FROM docker.io/cloudflare/sandbox:0.6.0
 
 # Expose ports you plan to use
 EXPOSE 8000

src/content/docs/sandbox/guides/websocket-connections.mdx

@@ -49,7 +49,7 @@ console.log("WebSocket server listening on port 8080");
 **Extend the Dockerfile:**
 
 ```dockerfile title="Dockerfile"
-FROM docker.io/cloudflare/sandbox:0.3.3
+FROM docker.io/cloudflare/sandbox:0.6.0
 
 # Copy echo server into the container
 COPY echo-server.ts /workspace/echo-server.ts
@@ -205,7 +205,7 @@ console.log(request.headers.get('Connection')); // 'Upgrade'
 Expose ports in Dockerfile for `wrangler dev`:
 
 ```dockerfile title="Dockerfile"
-FROM docker.io/cloudflare/sandbox:0.3.3
+FROM docker.io/cloudflare/sandbox:0.6.0
 
 COPY echo-server.ts /workspace/echo-server.ts
 COPY startup.sh /container-server/startup.sh

src/content/docs/sandbox/tutorials/ai-code-executor.mdx

@@ -41,7 +41,7 @@ cd ai-code-executor
 Update the `Dockerfile` to use the Python image variant (required for Python code execution):
 
 ```dockerfile title="Dockerfile"
-FROM docker.io/cloudflare/sandbox:0.3.3-python
+FROM docker.io/cloudflare/sandbox:0.6.0-python
 ```
 
 :::note