chore: setup dev containers (#138)

Co-authored-by: Alec Larson <[email protected]>

.devcontainer/devcontainer.json

@@ -0,0 +1,25 @@
+// 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": "Radashi",
+  // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+  "image": "mcr.microsoft.com/devcontainers/typescript-node:1-20-bookworm",
+
+  // Features to add to the dev container. More info: https://containers.dev/features.
+  "features": {
+    "ghcr.io/devcontainers-contrib/features/pnpm": {
+      "version": "9.1.3"
+    },
+    "ghcr.io/joshuanianji/devcontainer-features/mount-pnpm-store": {}
+  },
+  "postCreateCommand": "pnpm i",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "vitest.explorer",
+        "biomejs.biome",
+        "esbenp.prettier-vscode"
+      ]
+    }
+  }
+}