Create pull_request_template.md (#156)

* Create pull_request_template.md

* Update pull_request_template.md

* Update pull_request_template.md

* Update pull_request_template.md

* Update pull_request_template.md

.github/pull_request_template.md

@@ -0,0 +1,16 @@
+<!---
+Please add this into the test of test/fixture, format the changes by "terraform fmt", and test it by run the following:
+```sh
+$ docker build --build-arg BUILD_ARM_SUBSCRIPTION_ID=$ARM_SUBSCRIPTION_ID --build-arg BUILD_ARM_CLIENT_ID=$ARM_CLIENT_ID --build-arg BUILD_ARM_CLIENT_SECRET=$ARM_CLIENT_SECRET --build-arg BUILD_ARM_TENANT_ID=$ARM_TENANT_ID -t azure-compute .
+$ docker run --rm azure-compute /bin/bash -c "bundle install && rake full"
+```
+
+Please add this into the example usage of README.md and format the changes by "terrafmt fmt README.md". Please intall "terrafmt" by [install terrafmt](https://github.com/katbyte/terrafmt#install).
+--->
+
+Fixes #000 
+
+Changes proposed in the pull request:
+
+
+