Add dev container

Author: danbarr

.devcontainer/devcontainer.json

@@ -0,0 +1,18 @@
+{
+  "name": "Docusaurus",
+  "image": "mcr.microsoft.com/devcontainers/typescript-node:22-bookworm",
+  "features": {},
+  "forwardPorts": [3000],
+  "postCreateCommand": "npm install",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "unifiedjs.vscode-mdx",
+        "esbenp.prettier-vscode",
+        "davidanson.vscode-markdownlint",
+        "redhat.vscode-yaml",
+        "yzhang.markdown-all-in-one"
+      ]
+    }
+  }
+}