Update bitbucket-installation.md

Author: PavelLinearB

docs/bitbucket-installation.md

@@ -18,7 +18,7 @@ description: Install gitStream to your Bitbucket workspace.
 Bitbucket Installation Overview
 
 1. Designate a gitStream user account.
-2. Create a CM configuration file.
+2. Create a `cm` repo and `.cm` configuration file.
 3. Create a Bitbucket pipeline.
 4. Install the gitStream service.
 
@@ -31,21 +31,22 @@ We recommend creating a dedicated service account to control access to individua
 !!! tip "Use this account when you integrate gitStream"
     Make sure to use this account when authorizing Bitbucket in LinearB.
 
-## Create a CM Configuration File
+## Create a `cm` repo and `.cm` configuration file.
 
-Create a `gitstream.cm` rules file in the root directory of your repository's default branch (usually `master` or `main`). This file will contain a YAML configuration that determines the workflows that run on your repositories. You can name the CM file anything you want as long as it ends in `.cm`.
-
-!!! info "Configuration files go in the repo's root directory."
-    Your `.cm` files should be placed in the repository's root directory.
+Create a `cm` repository in your Bitbucket workspace. This repository must reside in the same project as your target repositories. In the root directory of the default branch (usually `master` or `main`), create a `gitstream.cm` rules file to define the workflow automations. The file can have any name, but it must end with `.cm`.
 
+!!! info "Configuration files locations"
+	Group-level rules require your `.cm` files to be placed in the `cm` repository's root directory.
+	You can also define specific repo-level rules under the `.cm` folder in each of the connected repositories
+ 
 !!! example "Example Configuration"
     ```yaml
     --8<-- "docs/downloads/gitstream-bb.cm"
     ```
 
 ## Create a Bitbucket Pipeline
 
-Once your gitStream configuration file is set up, you need a Bitbucket Pipelines configuration file to trigger gitStream automations. Create a `bitbucket-pipelines.yml` file in your repository's default branch (usually `master` or `main`) and add the following configuration:
+Once your gitStream configuration file is set up, you need a Bitbucket Pipelines configuration file to trigger gitStream automations. Create a `bitbucket-pipelines.yml` file in your `cm` repository's default branch and add the following configuration:
 
 ```yaml
 --8<-- "docs/downloads/bitbucket-pipelines.yml"