add NOTE on default registry (#53)

Signed-off-by: crosbymichael <michael_crosby@apple.com>

Author: crosbymichael

README.md

@@ -11,8 +11,6 @@ The tool consumes and produces OCI-compliant container images, so you can pull a
 
 ## Get started
 
-Install `container` on your Mac.
-
 ### Requirements
 
 You need an Apple silicon Mac to run `container`. To build it, see the [BUILDING](./BUILDING.md) document.

docs/tutorial.md

@@ -250,22 +250,27 @@ Push your image to a container registry, publishing it so that you and others ca
 
 To publish your image, you need push images to a registry service that stores the image for future use. Typically, you need to authenticate with a registry to push an image. This example assumes that you have an account at a hypothetical registry named `registry.example.com` with username `fido` and a password or token `my-secret`, and that your personal repository name is the same as your username.
 
+> [!NOTE]
+> By default `container` is configured to use Docker Hub.
+> You can change the default registry used by running `container registry default set <registry url>`.
+> See the other sub commands under `container registry` for more options.
+
 To sign into a secure registry with your login credentials, enter your username and password at the prompts after running:
 
 ```bash
-container registry login registry.example.com
+container registry login {registry.example.com}
 ```
 
 Create another name for your image that includes the registry name, your repository name, and the image name, with the tag `latest`:
 
 ```bash
-container images tag web-test registry.example.com/fido/web-test:latest
+container images tag web-test {registry.example.com/fido}/web-test:latest
 ```
 
 Then, push the image:
 
 ```bash
-container images push registry.example.com/fido/web-test:latest
+container images push {registry.example.com/fido}/web-test:latest
 ```
 
 ### Pull and run your image
@@ -274,8 +279,8 @@ To validate your published image, stop your current web server container, remove
 
 ```bash
 container stop my-web-server
-container images delete web-test registry.example.com/fido/web-test:latest
-container run --name my-web-server --detach --rm registry.example.com/fido/web-test:latest
+container images delete web-test {registry.example.com/fido}/web-test:latest
+container run --name my-web-server --detach --rm {registry.example.com/fido}/web-test:latest
 ```
 
 ## Clean up