Add tutorials

Author: ghostwriternr

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

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+---
+title: Configuration
+pcx_content_type: navigation
+sidebar:
+  order: 7
+---
+
+import { LinkTitleCard, CardGrid } from "~/components";
+
+Configure your Sandbox SDK deployment with Wrangler, customize container images, and manage environment variables.
+
+<CardGrid>
+
+<LinkTitleCard
+	title="Wrangler configuration"
+	href="/sandbox/configuration/wrangler/"
+	icon="document"
+>
+	Configure Durable Objects bindings, container images, and Worker settings in wrangler.jsonc.
+</LinkTitleCard>
+
+<LinkTitleCard
+	title="Dockerfile reference"
+	href="/sandbox/configuration/dockerfile/"
+	icon="wrench"
+>
+	Customize the sandbox container image with your own packages, tools, and configurations.
+</LinkTitleCard>
+
+<LinkTitleCard
+	title="Environment variables"
+	href="/sandbox/configuration/environment-variables/"
+	icon="gear"
+>
+	Pass configuration and secrets to your sandboxes using environment variables.
+</LinkTitleCard>
+
+</CardGrid>
+
+## Quick reference
+
+### Essential wrangler.jsonc settings
+
+```jsonc
+{
+  "name": "my-worker",
+  "main": "src/index.ts",
+  "compatibility_date": "2024-09-02",
+  "compatibility_flags": ["nodejs_compat"],
+  "durable_objects": {
+    "bindings": [
+      {
+        "name": "Sandbox",
+        "class_name": "Sandbox",
+        "script_name": "@cloudflare/sandbox"
+      }
+    ]
+  },
+  "containers": [
+    {
+      "binding": "CONTAINER",
+      "image": "ghcr.io/cloudflare/sandbox-runtime:latest"
+    }
+  ]
+}
+```
+
+### Common Dockerfile customizations
+
+```dockerfile
+FROM ghcr.io/cloudflare/sandbox-runtime:latest
+
+# Install additional Python packages
+RUN pip install scikit-learn tensorflow pandas
+
+# Install Node.js packages globally
+RUN npm install -g typescript ts-node
+
+# Install system packages
+RUN apt-get update && apt-get install -y postgresql-client
+
+# Add custom scripts
+COPY ./scripts /usr/local/bin/
+```
+
+### Environment variables
+
+```typescript
+// Pass to sandbox at creation
+const sandbox = getSandbox(env.Sandbox, 'my-sandbox');
+
+// Configure environment for commands
+await sandbox.exec('node app.js', {
+  env: {
+    NODE_ENV: 'production',
+    API_KEY: env.API_KEY,
+    DATABASE_URL: env.DATABASE_URL
+  }
+});
+```
+
+## Related resources
+
+- [Get Started guide](/sandbox/get-started/) - Initial setup walkthrough
+- [Wrangler documentation](/workers/wrangler/) - Complete Wrangler reference
+- [Docker documentation](https://docs.docker.com/engine/reference/builder/) - Dockerfile syntax
+- [Security model](/sandbox/concepts/security/) - Understanding environment isolation