Deploy App Service Plan - MLZ Example

[ExchMaster]

Description

This update adds a new example workload deployment. Specifically, it enables the deployment of an App Service Plan suitable for hosting Linux web applications using docker containers. Here are some of the details of the implementation:

• Updates mlz.bicep to include resourcePrefix as an deployment output. This allows examples to pick up the resourcePrefix straight from the deploymentVariables file. User can specify their own name via param if desired.
• Modified gitignore by adding a single line exception permitting files with the name 'plan' and in the ./src/bicep/* to be committed via git.
• Enabled the ability for the user doing the deployment to use custom resource group and specific subscription if desired. If unspecified, the default behavior is to deploy into an appropriate MLZ resource group with corresponding subscription. In this case, the shared services resource group.

Note: This example does not also deploy a web application because the target audience for this particular sample is the engineering/admin team. A separate example showing how to deploy a Linux web app container on docker will be forthcoming which is aimed at the dev team.

This update uses the bicep shared variable file pattern as described here: https://docs.microsoft.com/en-us/azure/azure-resource-manager/bicep/patterns-shared-variable-file

Issue reference

This PR is related to the following issue: #517
I did attempt to retrieve MLZ outputs using a deployment object, but ultimately failed to successfully do so do the dynamic nature of how the outputs are parsed/discovered at run-time. More research is needed, but felt this pattern solved the majority of the issue and is worthy of doing now while we continue to investigate how to use deployment objects for this problem.

Checklist

Please make sure you've completed the relevant tasks for this PR out of the following list:

• [see above] All acceptance criteria in the backlog item are met
• [ *] The documentation is updated to cover any new or changed features
• [ *] Manual tests have passed
• [ *] Relevant issues are linked to this PR

[glennmusa]

Looking good! Some minor nits and questions. My primary feedback is for allowing for the default parameter override behavior of ARM and Bicep. 👍

Cause I don't know how to show that it's resolved. The requested change has been implemented. :/

[brooke-hamilton]

I'm still reviewing but leaving these simple things here while I do deployments.

[brooke-hamilton]

Looks good. Thanks for the changes. ❤️

[brooke-hamilton]

Deployed successfully. Minor changes requested.