Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: valentinRyckaert

docs/docker.md

@@ -65,7 +65,7 @@ An Adminer instance to connect to and visualize your local database is accessibl
 
 <http://localhost:8080>
 
-Credentials are in the .env file (choose PostgreSQL for "System").
+Credentials are in the `.env` file. Use `db` as the server/host (choose PostgreSQL for "System").
 
 ### Testing