Add devcontainer file

.devcontainer/devcontainer.json

@@ -0,0 +1,42 @@
+// 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
+{
+    // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+    // "image": "mcr.microsoft.com/devcontainers/typescript-node:1-22-bookworm",
+
+    // Features to add to the dev container. More info: https://containers.dev/features.
+    // "features": {
+    //   "ghcr.io/devcontainers/features/node:1": {}
+    // },
+
+    "postCreateCommand": {
+       "dependencies": "npm install"
+    },
+
+    "postAttachCommand": "# Welcome to your Codespace! Run `npm run dev` to start development.",
+
+    // Configure tool-specific properties.
+    "customizations": {
+      "vscode": {
+        "extensions": ["esbenp.prettier-vscode"],
+        "settings": {
+          "editor.formatOnSave": true,
+          "[javascript]": {
+            "editor.defaultFormatter": "esbenp.prettier-vscode"
+          },
+          "[typescript]": {
+            "editor.defaultFormatter": "esbenp.prettier-vscode"
+          },
+          "[json]": {
+            "editor.defaultFormatter": "esbenp.prettier-vscode"
+          },
+          "[jsonl]": {
+            "editor.defaultFormatter": "esbenp.prettier-vscode"
+          },
+          "[jsonc]": {
+            "editor.defaultFormatter": "esbenp.prettier-vscode"
+          }
+        }
+      }
+    }
+  }