Update README.md

Author: Chuxel

README.md

@@ -10,21 +10,21 @@ This repository contains a set of **dev container definitions** made up of files
 
 ## Trying a definition
 
-1. Open a `containers` sub-folder
+1. Click on one of the `containers` sub-folders to open it in your browser
 2. Check out the README to see if there are any manual steps
 3. Clone this repository or copy the contents of the folder to your machine
 4. Run the **Remote: Open Folder in Container...** command in VS Code
 5. Select the definition folder in the "open" dialog
 
-Many definitions include a `test-project` that you can use to see the dev container in action.
+Many definitions include a `test-project` that you can use to see the dev container in action. Note that if you open this folder locally instead, you'll be prompted to reopen it in a container as well. You can also use the **Remote: Reopen Folder in Container** command at any time.
 
 ## Using a definition
 
 You can either:
 
-- Run **Remote: Create Container Configuration File...** command in VS Code and pick the definition.
+- Run **Remote: Create Container Configuration File...** command in VS Code and pick a definition. The appopriate files will then be added to your project.
 
-- Manually copy the contents of one of the `containers` sub-folders into your project. When manually copying, note that some definitions contain a `test-project` folder and/or a `.vscode/launch.json`, `.vscode/settings.json` or `.vscode/tasks.json` file that can be omitted.
+- Manually copy the contents of one of the `containers` sub-folders into your project. When manually copying, note that some definitions contain a `test-project` folder and/or `.vscode/launch.json`, `.vscode/settings.json`, or `.vscode/tasks.json` files. These and `README.md` and `.vscodeignore` can typically be omitted.
 
 ## Contents