feat: add devcontainer config

.devcontainer/devcontainer.json

@@ -0,0 +1,24 @@
+{
+	"name": "Roo Code",
+	"image": "mcr.microsoft.com/devcontainers/base:ubuntu-24.04",
+	"features": {
+		"ghcr.io/devcontainers/features/node:1": {
+			"version": "20.19.2",
+			"pnpm": "10.8.1"
+		}
+	},
+	"initializeCommand": "mkdir -p ${localEnv:HOME}/.pnpm-store",
+	"mounts": ["source=${localEnv:HOME}/.pnpm-store,target=/home/vscode/.pnpm-store,type=bind"],
+	"forwardPorts": [5173],
+	"postCreateCommand": "corepack enable && corepack prepare [email protected] --activate && pnpm install",
+	"updateContentCommand": "pnpm install",
+	"customizations": {
+		"vscode": {
+			"settings": {
+				"npm.packageManager": "pnpm"
+			},
+			"extensions": ["dbaeumer.vscode-eslint", "esbenp.prettier-vscode", "ms-vscode.vscode-typescript-next"]
+		}
+	},
+	"remoteUser": "vscode"
+}

CONTRIBUTING.md

@@ -94,6 +94,8 @@ All contributions start with a GitHub Issue using our skinny templates.
 
 ### Development Setup
 
+0. **Open in the Dev Container:** After cloning, use VS Code's **“Reopen in Container”** command to start the workspace inside the repository's `.devcontainer`. This prepares the correct Node.js and pnpm toolchain automatically.
+
 1. **Fork & Clone:**
 
 ```

README.md

@@ -35,7 +35,7 @@
 - [简体中文](locales/zh-CN/README.md)
 - [繁體中文](locales/zh-TW/README.md)
 - ...
-      </details>
+  </details>
 
 ---
 
@@ -89,6 +89,8 @@ Learn more: [Using Modes](https://docs.roocode.com/basic-usage/using-modes) •
 
 ## Local Setup & Development
 
+0. **Open in the Dev Container (recommended):** After cloning the repository, open it in VS Code and run **“Reopen in Container”** so development happens inside the provided `.devcontainer` environment. This ensures the correct Node.js and pnpm versions are available without additional manual setup.
+
 1. **Clone** the repo:
 
 ```sh