Update README.md (#5)

README.md

@@ -1,4 +1,4 @@
-# Azure CLI GitHub Action
+# GitHub Action for Azure CLI
 
 
 With Azure CLI GitHub Action, you can automate your workflow by executing [Azure CLI](https://github.com/Azure/azure-cli) commands to manage Azure resources inside of an Action.
@@ -105,6 +105,11 @@ Follow the steps to configure the secret:
   * Now in the workflow file in your branch: `.github/workflows/workflow.yml` replace the secret in Azure login action with your secret (Refer to the example above)
 
 
+## Note
+Please note that the action executes Az CLI script in a docker container. This means that the action is subjected to potential restrictions which arise from containerized execution. For example: 
+  1. If script sets up an environment variable, it will not take effect in host and hence subsequent actions shouldn't rely on such environment variable.
+  2. There is some restriction on how cross action file read/write is done. GITHUB_WORKSPACE directory in host is mapped to working directory inside container. So, if the action wants to create a file, which will be read by subsequent actions, it should do so within current working directory tree.
+
 ## Azure CLI Action metadata file
 
 ```