Update guide

docs/guides/ecosystem/nestjs.md

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+---
+name: Build a fullstack app with Nest.js and Bun
+---
+
+{% callout %}
+Requires Bun `v0.7.0` or later.
+{% /callout %}
+
+---
+
+Initialize your app with the Nest.js CLI.
+
+```sh
+$ bunx @nestjs/cli new my-app
+⚡  We will scaffold your app in a few seconds..
+
+? Which package manager would you ❤️  to use? bun
+CREATE my-app/.eslintrc.js (663 bytes)
+CREATE my-app/.prettierrc (51 bytes)
+CREATE my-app/README.md (3347 bytes)
+CREATE my-app/nest-cli.json (171 bytes)
+CREATE my-app/package.json (1947 bytes)
+CREATE my-app/tsconfig.build.json (97 bytes)
+CREATE my-app/tsconfig.json (546 bytes)
+CREATE my-app/src/app.controller.spec.ts (617 bytes)
+CREATE my-app/src/app.controller.ts (274 bytes)
+CREATE my-app/src/app.module.ts (249 bytes)
+CREATE my-app/src/app.service.ts (142 bytes)
+CREATE my-app/src/main.ts (208 bytes)
+CREATE my-app/test/app.e2e-spec.ts (630 bytes)
+CREATE my-app/test/jest-e2e.json (183 bytes)
+
+✔ Installation in progress... ☕
+
+🚀  Successfully created project my-app
+👉  Get started with the following commands:
+
+  $ cd my-app
+  $ bun run start
+```
+
+---
+
+As the Nest.js templater intructed, let's `cd` into our app directory and start the development server.
+
+```sh
+$ cd my-app
+$ bun run start
+ $ nest start
+  [Nest] 35114  - 08/09/2023, 1:51:29 PM     LOG [NestFactory] Starting Nest application...
+  [Nest] 35114  - 08/09/2023, 1:51:29 PM     LOG [InstanceLoader] AppModule dependencies initialized +5ms
+  [Nest] 35114  - 08/09/2023, 1:51:29 PM     LOG [RoutesResolver] AppController {/}: +7ms
+  [Nest] 35114  - 08/09/2023, 1:51:29 PM     LOG [RouterExplorer] Mapped {/, GET} route +0ms
+  [Nest] 35114  - 08/09/2023, 1:51:29 PM     LOG [NestApplication] Nest application successfully started +1ms
+```
+
+---
+
+To run the server in watch mode. Nest.js does not support hot reloading [out of the box](https://docs.nestjs.com/recipes/hot-reload), but you can run the server in watch mode. This will restart the server when changes are made.
+
+```sh
+$ bun run start:dev
+```
+
+---
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.