fix: migrate new files

Author: lacolaco

adev-ja/src/content/reference/errors/NG0401.md

@@ -0,0 +1,18 @@
+# Missing Platform
+
+Angular requires a platform to be initialized. This error is thrown when `bootstrapApplication` is used on the server without providing a `BootstrapContext`.
+
+When using server-side rendering, `bootstrapApplication` requires a `BootstrapContext` to be passed as an argument.
+
+## Debugging the error
+
+To resolve this error, ensure that your `main.server.ts` file correctly passes a `BootstrapContext` to the `bootstrapApplication` function.
+
+```typescript
+import { bootstrapApplication, BootstrapContext } from '@angular/platform-browser';
+import { App } from './app/app';
+import { config } from './app/app.config.server';
+
+const bootstrap = (context: BootstrapContext) => bootstrapApplication(App, config, context);
+export default bootstrap;
+```