fix ordering in contributing doc

Author: msukkari

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 >[!NOTE]
 > Building from source is only required if you'd like to contribute. The recommended way to use Sourcebot is to use the [pre-built docker image](https://github.com/sourcebot-dev/sourcebot/pkgs/container/sourcebot).
 
-1. Install <a href="https://go.dev/doc/install"><img src="https://go.dev/favicon.ico" width="16" height="16"> go</a>, and <a href="https://nodejs.org/"><img src="https://nodejs.org/favicon.ico" width="16" height="16"> NodeJS</a>. Note that a NodeJS version of at least `21.1.0` is required.
+1. Install <a href="https://go.dev/doc/install"><img src="https://go.dev/favicon.ico" width="16" height="16"> go</a>, <a href="https://docs.docker.com/get-started/get-docker/"><img src="https://www.docker.com/favicon.ico" width="16" height="16"> docker</a>, and <a href="https://nodejs.org/"><img src="https://nodejs.org/favicon.ico" width="16" height="16"> NodeJS</a>. Note that a NodeJS version of at least `21.1.0` is required.
 
 2. Install [ctags](https://github.com/universal-ctags/ctags) (required by zoekt)
     ```sh
@@ -13,28 +13,32 @@
     snap install universal-ctags
     ```
 
-3. Install <a href="https://docs.docker.com/get-started/get-docker/"><img src="https://www.docker.com/favicon.ico" width="16" height="16"> docker</a> and start the development Docker containers for PostgreSQL and Redis.
-
+3. Install `yarn`:
     ```sh
-    docker compose -f docker-compose-dev.yml up -d
+    npm install --global yarn
     ```
 
-4. Clone the repository with submodules:
+3. Clone the repository with submodules:
     ```sh
     git clone --recurse-submodules https://github.com/sourcebot-dev/sourcebot.git
     ```
-
-5. Run `make` to build zoekt and install dependencies:
+4. Run `make` to build zoekt and install dependencies:
     ```sh
     cd sourcebot
     make
     ```
 
     The zoekt binaries and web dependencies are placed into `bin` and `node_modules` respectively.
 
+5. Start the development Docker containers for PostgreSQL and Redis.
+
+    ```sh
+    docker compose -f docker-compose-dev.yml up -d
+    ```
+
 6. Create a copy of `.env.development` and name it `.env.development.local`. Update the required environment variables.
 
-7. If you're using a declerative configuration file (the default behavior if you didn't enable auth), create a configuration file and update the `CONFIG_PATH` environment variable in your `.env.development.local` file.
+7. If you're using a declerative configuration file, create a configuration file and update the `CONFIG_PATH` environment variable in your `.env.development.local` file.
 
 8. Start Sourcebot with the command:
     ```sh