Add README with usage instructions

README.md

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+# ClawdBox
+
+A persistent sandbox environment for Clawdbot (OpenClaw).
+
+## Purpose
+This container provides a stable, tool-rich environment for the AI agent to:
+- Persist state across agent restarts.
+- Run long-running processes.
+- Perform "messy" work (compiling, scraping, data processing) without polluting the main agent container or host.
+- Use tools that aren't available in the minimal agent environment.
+
+## Tools Included
+- **Core:** curl, wget, git, jq, yq, unzip, tar, vim/nano
+- **Dev:** python3 (pip/venv), build-essential, nodejs, npm
+- **Network:** ping, dnsutils, net-tools
+- **Media:** ffmpeg
+- **Access:** openssh-server
+
+## Deployment (OpenShift / K8s)
+
+1. **Build Image:**
+   ```bash
+   docker build -t clawdbox .
+   ```
+
+2. **Run with Persistence:**
+   Ensure you mount a PVC to `/data` to keep files across restarts.
+
+   ```yaml
+   apiVersion: v1
+   kind: Pod
+   metadata:
+     name: clawdbox
+   spec:
+     containers:
+     - name: clawdbox
+       image: clawdbox:latest
+       ports:
+       - containerPort: 22
+       volumeMounts:
+       - mountPath: /data
+         name: claw-data
+     volumes:
+     - name: claw-data
+       persistentVolumeClaim:
+         claimName: claw-pvc
+   ```
+
+## Access
+Connect via SSH using the `claw` user (passwordless sudo enabled).