Update CONTRIBUTING.md

Author: cristianrgreco

CONTRIBUTING.md

@@ -23,15 +23,18 @@ To update the docs for your new module, you'll have to:
 
 #### Using Docker
 
-The root of the project contains a `docker-compose.yml` file. Simply run `docker-compose up` and then access the docs at [http://localhost:8000](http://localhost:8000).
+```shell
+npm run docs:serve
+```
+
+Then access the docs at [http://localhost:8000](http://localhost:8000).
 
 #### Using Python
 
 * Ensure that you have Python 3.8.0 or higher.
 * Set up a virtualenv and run `pip install -r requirements.txt` in the `testcontainers-node` root directory.
 * Once Python dependencies have been installed, run `mkdocs serve` to start a local auto-updating MkDocs server.
 
-#### PR Preview deployments
-
-Documentation for pull requests will automatically be published by Netlify as 'deploy previews'. These deployment previews can be accessed via the `deploy/netlify` check that appears for each pull request.
+#### PR preview deployments
 
+Documentation for pull requests will automatically be published by Netlify as "deploy previews". These deployment previews can be accessed via the `deploy/netlify` check that appears for each pull request.