How do I create templates?

The azd template has this file structure defined by azd conventions

├── .devcontainer              [ For DevContainer ]
├── .github/.azdo              [ Configure GitHub workflow or Azure Pipelines ]
├── .vscode                    [ VS Code workspace configurations ]
├── infra                      [ Creates and configures Azure resources ]
│   ├── main.bicep/main.tf     [ Main infrastructure file ]
│   ├── main.parameters.json/  [ Parameters file ]
        main.tfvars.json   
├── src                        [ Contains directories for the app code ]
└── azure.yaml                 [ Describes the app and type of Azure resources]

The Azure Developer CLI (azd) tool helps you with the process of creating the template with azd init as the first step, followed by creation of the infra/ folder, updating of the azure.yaml file, and validation of template using azd up to provision and deploy resources.

READ THE DOCS

Learn more about making your codebase azdcompatible