docs: fix Docker image cleanup command

Author: anh nguyen

content/docs/local/docker.mdx

@@ -132,7 +132,7 @@ docker compose down
 
 ```bash filename="Remove all existing docker images"
 # Linux/Mac
-docker images -a | grep "librechat" | awk '{print $3}' | xargs docker rmi
+docker images -a --filter "reference=*librechat*" --format "{{.ID}}" | xargs docker rmi
 
 # Windows (PowerShell)
 docker images -a --format "{{.ID}}" --filter "reference=*librechat*" | ForEach-Object { docker rmi $_ }

content/docs/remote/docker_linux.mdx

@@ -336,7 +336,7 @@ docker compose -f ./deploy-compose.yml down
 
 ```bash filename="Remove all existing docker images"
 # Linux/Mac
-docker images -a | grep "librechat" | awk '{print $3}' | xargs docker rmi
+docker images -a --filter "reference=*librechat*" --format "{{.ID}}" | xargs docker rmi
 
 # Windows (PowerShell)
 docker images -a --format "{{.ID}}" --filter "reference=*librechat*" | ForEach-Object { docker rmi $_ }