docs: use prebuilt gpt-oss container (#2313)

components/backends/trtllm/gpt-oss.md

@@ -34,7 +34,18 @@ docker compose -f deploy/docker-compose.yml up
 
 ## Instructions
 
-### 1. Build the Container
+### 1. Pull the Container
+
+```bash
+export DYNAMO_CONTAINER_IMAGE="nvcr.io/nvidia/ai-dynamo/tensorrtllm-gpt-oss:latest"
+
+docker pull $DYNAMO_CONTAINER_IMAGE
+```
+
+<details>
+<summary> Building your own container </summary>
+
+If you'd like to build your own Dynamo container, use the following instructions
 
 **For ARM64 (GB200):**
 ```bash
@@ -65,6 +76,8 @@ docker build -f container/Dockerfile.tensorrt_llm_prebuilt . \
   -t $DYNAMO_CONTAINER_IMAGE
 ```
 
+</details>
+
 ### 2. Download the Model
 
 ```bash