Add support for Codespaces (#3432)

* Create devcontainer.json

* WIP

* WIP

* WIP

* Create README.md

* Try to fix cypress issue

* Add extensions

* WIP

* Minor

config/vite.config.js

@@ -17,6 +17,7 @@ export default defineConfig({
     },
     define: {
         "FRONTEND_VERSION": JSON.stringify(process.env.npm_package_version),
+        "DEVCONTAINER": process.env.DEVCONTAINER,
     },
     plugins: [
         commonjs(),