docs(bridge): add notes about feature flags (#1634)

Co-authored-by: Pooya Parsa <pyapar@gmail.com>

docs/content/1.getting-started/3.bridge.md

@@ -120,10 +120,10 @@ If you are using TypeScript, you can edit your `tsconfig.json` to benefit from a
 
 ```diff [tsconfig.json]
 {
-+    "extends": "./.nuxt/tsconfig.json",
++ "extends": "./.nuxt/tsconfig.json",
-     "compilerOptions": {
+  "compilerOptions": {
-       ...
+    ...
-     }
+  }
 }
 ```
 
@@ -184,7 +184,7 @@ Add the folder `.output` to the `.gitignore` file.
 
 ✔️ Try with `nuxt dev` and `nuxt build` (or `nuxt generate`) to see if everything goes well.
 
-🐛 Is something wrong? Please let us know by creating an issue. Also, you can easily disable bridge in the meantime:
+🐛 Is something wrong? Please let us know by creating an issue. Also, you can easily disable the bridge in the meantime:
 
 ```ts [nuxt.config.js|ts]
 import { defineNuxtConfig } from '@nuxt/bridge'
@@ -193,3 +193,53 @@ export default defineNuxtConfig({
   bridge: false // Temporarily disable bridge integration
 })
 ```
+
+## Feature Flags
+
+You can optionally disable some features from bridge or opt-in to less stable ones. In normal circumstances, it is always best to stick with defaults!
+
+You can check [bridge/src/module.ts](https://github.com/nuxt/framework/blob/main/packages/bridge/src/module.ts) for latest defaults.
+
+```ts [nuxt.config.js|ts]
+import { defineNuxtConfig } from '@nuxt/bridge'
+
+export default defineNuxtConfig({
+  bridge: {
+
+    // -- Opt-in features --
+
+    // Use Vite as the bundler instead of Webpack 4
+    // vite: true,
+
+    // -- Default features --
+
+    // Use legacy server instead of Nitro
+    // nitro: false,
+
+    // Disable nuxt 3 compatible `nuxtApp` interface
+    // app: false,
+
+    // Disable composition API support
+    // capi: false,
+
+    // Do not transpile modules
+    // transpile: false,
+
+    // Disable <script setup> support
+    // scriptSetup: false,
+
+    // Disable composables auto importing
+    // autoImports: false,
+
+    // Do not warn about module incompatibilities
+    // constraints: false,
+
+    // Disable Nuxt 3 compatible useMeta
+    // meta: false,
+  },
+
+  vite: {
+    // Config for Vite
+  }
+})
+```