Improve some tutorial intros

Author: commit111

docs/tutorials/deploy-container-using-the-cli.mdx

@@ -5,10 +5,9 @@ sidebar_position: 200
 
 # Deploy Existing Containers
 
-This tutorial will show you how to deploy an existing container/multi-container application. 
+This tutorial will show you how to deploy an existing container/multi-container application using Defang. 
 
-This example is rather useful if you already have a Docker container built manually, or through a CI/CD system where the resulting image is available in a public or private repository accessible by Defang.
-But it is not required in order to follow along to this tutorial. 
+This is rather useful if you already have a Docker container built manually, or through a CI/CD system (where the resulting image is available in a public or private repository accessible by Defang), but it is not required in order to follow along. 
 
 # Step 1 - Make a Docker Compose file
 :::tip

docs/tutorials/deploy-with-gpu.mdx

@@ -5,7 +5,9 @@ sidebar_position: 500
 
 # Deploy a GPU-Powered Application to AWS
 
-This tutorial guides you to create and deploy a GPU-powered application on AWS using Defang and Mistral. We will walk you through the whole deployment process based on the [Mistral & vLLM](https://github.com/DefangLabs/samples/tree/main/samples/vllm) sample.
+This tutorial will show you how to create and deploy a GPU-powered application on AWS using Defang. 
+
+We will walk you through the whole deployment process based on the [Mistral & vLLM](https://github.com/DefangLabs/samples/tree/main/samples/vllm) sample.
 
 :::info
 Note that GPU deployments are not permitted on the Defang Playground. You must [upgrade to a paid account](https://defang.io/pricing/) and [deploy to your own cloud account](https://docs.defang.io/docs/tutorials/deploy-to-your-cloud).

docs/tutorials/updating-your-services.md

@@ -6,6 +6,10 @@ description: How to update services deployed with Defang
 
 # Updating Your Services
 
+This page will show you how to update your services in Defang.
+
+## Updating a Service
+
 To update your app (for example, updating the base image of your container, or making changes to your code) all you have to do is run the `defang compose up` command and it will build and deploy a new version.
 
 ## Deploying New Services or Removing Existing Services