Update HOW_TO_USE_DOCKER.md (#1697)

format Markdown / YAML code snippet

docker/HOW_TO_USE_DOCKER.md

@@ -87,10 +87,13 @@ mintplexlabs/anythingllm;
 </td>
 </tr>
 <tr>
-  <td> Docker Compose</td>
-  <td>
-      version: '3.8'
-      services:
+<td> Docker Compose</td>
+<td>
+
+
+```yaml
+version: '3.8'
+services:
   anythingllm:
     image: mintplexlabs/anythingllm
     container_name: anythingllm
@@ -120,13 +123,15 @@ mintplexlabs/anythingllm;
       - anythingllm_storage:/app/server/storage
     restart: always
 
-      volumes:
+volumes:
   anythingllm_storage:
     driver: local
     driver_opts:
       type: none
       o: bind
       device: /path/on/local/disk
+```
+
   </td>
 </tr>
 </table>