Add crane recipes.md (#957)

cmd/crane/README.md

@@ -5,6 +5,8 @@ and registries.
 
 <img src="../../images/crane.png" width="40%">
 
+A collection of useful things you can do with `crane` is [here](cmd/crane/recipes.md).
+
 ## Installation
 
 Download [latest release](https://github.com/google/go-containerregistry/releases/latest).

cmd/crane/recipes.md

@@ -0,0 +1,31 @@
+# `crane` Recipes
+
+Useful tips and things you can do with `crane` and other standard tools.
+
+### Extract a single file from an image
+
+```
+crane export ubuntu - | tar -Oxf - etc/passwd
+```
+
+Note: Be sure to remove the leading `/` from the path (not `/etc/passwd`)
+
+### Bundle directory contents into an image
+
+```
+crane append -f <(tar -f - -c some-dir/) -t ${IMAGE}
+```
+
+By default, this produces an image with one layer containing the directory contents. Add `-b ${BASE_IMAGE}` to append the layer to a base image instead.
+
+### Diff two configs
+
+```
+diff <(crane config busybox:1.32 | jq) <(crane config busybox:1.33 | jq)
+```
+
+### Diff two manifests
+
+```
+diff <(crane manifest busybox:1.32 | jq) <(crane manifest busybox:1.33 | jq)
+```