Update README.md with new command and fix subcommand help text

camerondurham · Aug 27, 2021 · 2fefb1b · 2fefb1b
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diff --git a/README.md b/README.md
@@ -232,6 +232,19 @@ Usage:
   ch running
 ```
 
+### `ch update`
+
+update an environment's image
+
+If you specified a Dockerfile when using `ch create`, this will re-build that image.
+If you specified a remote container registry when using `ch create`, it will try
+to re-pull the image from that path.
+
+```txt
+Usage:
+  ch update [ENVIRONMENT_NAME]
+```
+
 ## More Examples
 
 ```shell script

diff --git a/cmd/update.go b/cmd/update.go
@@ -10,7 +10,7 @@ import (
 
 // updateCmd represents the update command
 var updateCmd = &cobra.Command{
-	Use:     "update",
+	Use:     "update [ENVIRONMENT_NAME]",
 	Short:   "download or rebuild environment's image",
 	Args:    cobra.MinimumNArgs(1),
 	Version: rootCmd.Version,