Add devcontainer config

Author: gilbitron

.devcontainer/devcontainer.json

@@ -0,0 +1,20 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/javascript-node
+{
+    "name": "Node.js",
+    // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+    "image": "mcr.microsoft.com/devcontainers/javascript-node:1-20-bullseye",
+    "features": {
+        "ghcr.io/devcontainers/features/node:1": {}
+    }
+    // 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"
+}