Update docs/admin/how-to/install/installing-in-a-container.md

Co-authored-by: Chris Burr <chrisburr@users.noreply.github.com>

Author: marianne013

docs/admin/how-to/install/installing-in-a-container.md

@@ -149,7 +149,7 @@ exec "$@"
 
 ## Install the code
 
-```
+```bash
 git clone https://github.com/DIRACGrid/diracx.git
 git checkout v0.0.2 # (note: the version matches image: ghcr.io/diracgrid/diracx/services:v0.0.2 in
  the yaml file)