Update README

README.md

@@ -1,3 +1,29 @@
 # Dev Sandbox
 
 This is a Dockerfile definition for a container that I use to sandbox my Pi coding agent.
+This also contains my Pi coding agent configuration.
+
+## Setup 
+
+Set up Docker container
+
+```bash
+docker build -t dev_sandbox .
+```
+
+Function I use to execute the sandbox:
+```zsh
+sandbox() {
+ if ! docker ps -a --format '{{.Names}}' | grep -q '^dev-sandbox$'; then
+   docker run -dit --name dev-sandbox \
+     --env-file ~/rescale/dev_sandbox/.env \
+     -v ~/repos:/workspace \
+     -v pi-state:/root/.pi \
+     -v /var/run/docker.sock:/var/run/docker.sock \
+     dev-sandbox:latest
+ else
+   docker start dev-sandbox 2>/dev/null
+ fi
+ docker exec -it dev-sandbox /bin/zsh
+}
+```