Document VS Code Dev Containers integration for local and remote Docker

DOCKER_HUB.md

@@ -317,6 +317,28 @@ bun run src/index.ts
 
 Node modules are stored in your project directory under `/workspace` and persist automatically.
 
+## VS Code Integration
+
+VS Code can connect directly to a running opencode-devbox container for a full IDE experience with IntelliSense, debugging, and extensions running inside the container.
+
+**Requirements:** Install the [Dev Containers](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers) extension. For remote Docker hosts, also install [Remote - SSH](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-ssh).
+
+**Steps:**
+
+1. Start the container: `docker compose up -d`
+2. In VS Code: `Ctrl+Shift+P` → "Dev Containers: Attach to Running Container" → select `opencode-devbox`
+
+For remote Docker hosts (e.g. connecting to a server via SSH), first connect to the remote host with Remote-SSH, then attach to the container from there.
+
+VS Code extensions installed inside the container persist as long as the container exists. For persistent extension storage across container recreations, add a named volume:
+
+```bash
+docker run -it --rm \
+  -v devbox-vscode:/home/developer/.vscode-server \
+  ... \
+  joakimp/opencode-devbox:latest
+```
+
 ## Using docker-compose
 
 Create a directory with a `docker-compose.yml` and a `.env` file: