mark some steps optional, and hide the steps to deploy existing AI (#162)

as title

## Purpose
refine the process

## Does this introduce a breaking change?
<!-- Mark one with an "x". -->
```
[ ] Yes
[x] No
```

## Pull Request Type
What kind of change does this Pull Request introduce?

<!-- Please check the one that applies to this PR using "x". -->
```
[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:
```

Author: sonwan2020

docs/03_lab_monitor/0303.md

@@ -1,5 +1,5 @@
 ---
-title: '3. Application Insights'
+title: '3. Application Insights (Optional)'
 layout: default
 nav_order: 3
 parent: 'Lab 3: Enable monitoring'

docs/03_lab_monitor/0304.md

@@ -1,5 +1,5 @@
 ---
-title: '4. Azure Managed Grafana'
+title: '4. Azure Managed Grafana (Optional)'
 layout: default
 nav_order: 4
 parent: 'Lab 3: Enable monitoring'

docs/05_lab_openai/0501.md

@@ -1,5 +1,5 @@
 ---
-title: '1. Create Azure OpenAI resources'
+title: 'Create Azure OpenAI resources (Optional)'
 layout: default
 nav_order: 1
 parent: 'Lab 5: Integrate with Azure OpenAI'
@@ -23,19 +23,9 @@ To add AI capablities to the application, you need create an Azure OpenAI accoun
       --custom-domain $OPEN_AI_SERVICE_NAME
    ```
 
-2. Deploy language models in your Azure OpenAI service instance. Use the following commands to deploy two language models `text-embedding-ada-002` and `gpt-4o`.
+1. Deploy language models in your Azure OpenAI service instance. Use the following commands to deploy model `gpt-4o`.
 
    ```bash
-   az cognitiveservices account deployment create \
-      --resource-group $RESOURCE_GROUP \
-      --name $OPEN_AI_SERVICE_NAME \
-      --deployment-name text-embedding-ada-002 \
-      --model-name text-embedding-ada-002 \
-      --model-version "2"  \
-      --model-format OpenAI \
-      --sku-name "Standard" \
-      --sku-capacity 30
-
    az cognitiveservices account deployment create \
       --resource-group $RESOURCE_GROUP \
       --name $OPEN_AI_SERVICE_NAME \
@@ -44,22 +34,13 @@ To add AI capablities to the application, you need create an Azure OpenAI accoun
       --model-version 2024-08-06 \
       --model-format OpenAI \
       --sku-name "GlobalStandard" \
-      --sku-capacity 30
+      --sku-capacity 10
    ```
 
 {: .note }
 > In Azure OpenAI, model availability varies by region. Please check [related information](https://learn.microsoft.com/en-us/azure/ai-services/openai/concepts/models) to choose the model version.
 
+1. Navigate to your open AI instance and get the endpoint and api-key.
 
-3. To securely access Azure OpenAI API call, you need assign `Cognitive Services OpenAI User` role for your managed identity. 
-
-   ```bash
-   OPEN_AI_RESOURCE_ID=$(az cognitiveservices account show --name $OPEN_AI_SERVICE_NAME --resource-group $RESOURCE_GROUP --query id --output tsv)
-
-   APPS_IDENTITY_SP_ID=$(az identity show --resource-group $RESOURCE_GROUP --name $APPS_IDENTITY --query principalId --output tsv)
-
-   az role assignment create \
-      --role "Cognitive Services OpenAI User" \
-      --scope $OPEN_AI_RESOURCE_ID \
-      --assignee $APPS_IDENTITY_SP_ID
-   ```
+   {: .note }
+   Ask the subscription administrator for help if you see errors like `{"error":{"code":"BadRequest","message":"Failed to list key. disableLocalAuth is set to be true"}}`.

docs/05_lab_openai/0502.md

@@ -2,6 +2,7 @@
 title: '2. Deploy sample AI application chat-agent'
 layout: default
 nav_order: 2
+nav_exclude: true
 parent: 'Lab 5: Integrate with Azure OpenAI'
 ---