Update README and PR Template

.github/CONTRIBUTING.md

@@ -42,6 +42,11 @@ Please, find below the steps that should be followed to contribute:
 
     You can run `make build` in case you have make installed in your system in case you don't you can run from the repository root `go generate` followed by `go fmt ./...` and them `go test ./...`
 
+7. Update the README.MD with coverage
+
+    For quick reference, update the [README.md#resource-status](../README.md) at the root of the provider to mention the coverage you just added:
+    ```|azurerm_api_management_custom_domain | ✔ |```
+
 7. Commit and submit PR
 
     Now you should commit, remembering to put a meaningful commit message. After that, you should [make pull request](https://docs.github.com/en/free-pro-team@latest/github/collaborating-with-issues-and-pull-requests/creating-a-pull-request) remembering to link in the PR the issue that it is solving.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,28 @@
+# [Issue-id](https://github.com/Azure/caf-terraform-landingzones/issues/ISSUE-ID-GOES-HERE)
+
+## PR Checklist
+
+---
+
+<!-- Use the check list below to ensure your branch is ready for PR. -->
+
+- [ ] I have read the [CONTRIBUTING.MD instructions](./CONTRIBUTING.md)
+- [ ] I have changed the `resourceDefinition.json`
+- [ ] I have generated the resource model (there's a ```models_generated.go``` file in my PR)
+- [ ] I have updated the [README.md#resource-status](../README.md)
+- [ ] I have checked to ensure there aren't other open Pull Requests for the same update/change?
+
+## Description
+
+<!-- Concise description of the problem and the solution or the feature being added -->
+
+## Does this introduce a breaking change
+
+- [ ] YES
+- [ ] NO
+
+<!-- If this introduces a breaking change, please describe the impact and migration path for existing applications below. -->
+
+## Testing
+
+<!-- Instructions for testing and validation of your code -->

README.md

@@ -174,6 +174,7 @@ This is the current compreheensive status of the implemented resources in the pr
 |azurerm_api_management_certificate | ✔ |
 |azurerm_api_management_custom_domain | ✔ |
 |azurerm_api_management_diagnostic | ❌ |
+|azurerm_api_management_gateway | ✔ |
 |azurerm_api_management_group | ✔ |
 |azurerm_api_management_group_user | ✔ |
 |azurerm_api_management_identity_provider_aad | ❌ |