introduce devcontainers

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/typescript-node:1-20-bookworm
+
+ARG EMSDK_DIR=/emsdk
+
+RUN apt-get update -y && \
+    apt-get -y install --no-install-recommends \
+        curl \
+        ca-certificates \
+        zip \
+        unzip \
+        xz-utils \
+        bzip2 \
+        sed \
+        git-core \
+        python3
+
+RUN git clone --depth 1 -- /~https://github.com/emscripten-core/emsdk.git $EMSDK_DIR && \
+    cd $EMSDK_DIR && \
+    ./emsdk install latest && \
+    ./emsdk activate latest && \
+    echo ". $EMSDK_DIR/emsdk_env.sh" >> /etc/bash.bashrc

.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/typescript-node
+{
+	"name": "Node.js & TypeScript",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
+
+	// 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": "yarn install",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+
+	"runArgs": [
+		"--userns=keep-id"
+	],
+	"containerEnv": {
+		"HOME": "/home/node"
+	}
+}

.vscode/extensions.json

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+{
+    "recommendations": [
+        "ms-vscode-remote.remote-containers"
+    ]
+}