Merge pull request #574 from hrismarin/docs-getting-started

Docs - Getting Started: Fix examples of using container images

docs/getting-started.md

@@ -19,14 +19,17 @@ Using the official container images is the recommended option.
 This example uses `podman`, but `docker` can also be used.
 
 ```bash
-# Pull the latest release
+# Pull the container image release
 podman pull quay.io/coreos/butane:release
 
-# Run butane using standard in and standard out
-podman run -i --rm quay.io/coreos/butane:release --pretty --strict < your_config.bu > transpiled_config.ign
+# Run Butane using standard input and standard output
+podman run --interactive --rm quay.io/coreos/butane:release \
+       --pretty --strict < your_config.bu > transpiled_config.ign
 
-# Run butane using files.
-podman run --rm -v /path/to/your_config.bu:/config.bu:z quay.io/coreos/butane:release --pretty --strict /config.bu > transpiled_config.ign
+# Run Butane using a file as input and standard output
+podman run --interactive --rm --security-opt label=disable \
+       --volume ${PWD}:/pwd --workdir /pwd quay.io/coreos/butane:release \
+       --pretty --strict your_config.bu > transpiled_config.ign
 ```
 
 You may also add the following alias in your shell configuration: