docs(srv): update

Author: SamyOubouaziz

tutorials/deploy-mdbooks-serverless-containers/index.mdx

@@ -59,7 +59,7 @@ With zero infrastructure management and many tools to integrate in CI/CD environ
 
 1. Create a file named `Dockerfile` in the previously created folder, and add the following code to it:
 
-    ```
+    ```docker
     FROM debian:bookworm-slim
 
     WORKDIR /app