perf: cut cold route compilation and unblock preview images (#6441)

apps/docs/docs/advanced/development/getting-started.mdx

@@ -14,8 +14,8 @@ This guide will help you set up your development environment to start contributi
 
 ### Prerequisites
 
-- **Node.js (lts)**: You can download it from the [official website](https://nodejs.org/).
-- **pnpm (latest)**: You can install it by running `npm install -g pnpm`.
+- **Node.js 24.18 or newer**: You can download it from the [official website](https://nodejs.org/).
+- **Corepack**: Run `corepack enable` so the repository selects its pinned pnpm version.
 - **Git**: You can download it from the [official website](https://git-scm.com/).
 - **Docker or Docker Desktop**: Required for the Redis service and the developer Docker CLI.
 - **Go 1.25+**: Required only for the developer Docker CLI. You can download it from the [official website](https://go.dev/).
@@ -49,7 +49,10 @@ This guide will help you set up your development environment to start contributi
 
 #### During development
 
-- `pnpm dev`: Start the development server.
+- `pnpm dev`: Start the Next.js development server.
+- `pnpm dev:benchmark`: Run the local authenticated-board benchmark. Set `DEV_BENCHMARK_BOARD_URL` and
+  `DEV_BENCHMARK_STORAGE_STATE`; readiness-only measurements require the explicit `--smoke` flag and are not
+  suitable for performance claims.
 - `pnpm dev:cli -- dev`: Browse and run local images and remote pull-request images.
 - `pnpm dev:cli -- build <name>`: Build the current checkout as `homarr:<name>`.
 - `pnpm dev:cli -- build --pr <number>`: Build a pull request locally from a temporary checkout.
@@ -74,4 +77,5 @@ This guide will help you set up your development environment to start contributi
 
 - `pnpm build`: Build the project for production.
 - `pnpm dev:cli -- build <name>`: Build a `homarr:<name>` image and record its checkout for later rebuilds.
+- `docker build -t homarr .`: Build a docker image for the project.
 - `docker run -p 7575:7575 -e SECRET_ENCRYPTION_KEY='your_64_character_hex_string' homarr:<name>`: Run the created docker image.