build: Add simple devcontainer

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/rust:1-1-bookworm
+RUN apt-get update && apt-get install -y nodejs

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/rust
+{
+    "name": "Rust",
+    //"image": "mcr.microsoft.com/devcontainers/rust:1-1-bookworm",
+    "build": {
+        // Path is relative to the devcontainer.json file.
+        "dockerfile": "Dockerfile"
+    },
+    "features": {
+        "ghcr.io/lee-orr/rusty-dev-containers/cargo-expand:0": {}
+    }
+
+    // Use 'mounts' to make the cargo cache persistent in a Docker Volume.
+    // "mounts": [
+    //    {
+    //        "source": "devcontainer-cargo-cache-${devcontainerId}",
+    //        "target": "/usr/local/cargo",
+    //        "type": "volume"
+    //    }
+    // ]
+
+    // Features to add to the dev container. More info: https://containers.dev/features.
+    // "features": {},
+
+    // Use 'forwardPorts' to make a list of ports inside the container available locally.
+    // "forwardPorts": [],
+
+    // Use 'postCreateCommand' to run commands after the container is created.
+    // "postCreateCommand": "rustc --version",
+
+    // Configure tool-specific properties.
+    // "customizations": {},
+
+    // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+    // "remoteUser": "root"
+}
+