update readme and help

README.md

@@ -1,5 +1,22 @@
 # image-forge
 
+## Wrapper
+
+### Examples
+
+From the repository
+
+```shell
+image-build -b sisyphus -r registry.altlinux.org --prefix=k8s-sisyphus kube-apiserver kubernetes1.28
+```
+
+From a task
+
+```shell
+image-build -b sisyphus -r test.registry.altlinux.org -t 335250 --prefix=k8s-sisyphus kube-apiserver kubernetes1.28
+```
+
+
 ## alt images
 To build `alt` images, run:
 ```bash

image-build

@@ -9,15 +9,19 @@ $PROG - build an OCI image from a package
 Usage: $PROG [options] <image name> <package name>
 
 Options:
-  -b <branch>		branch
-  -r <registry>		registry
-  -t <task_id>		task id
+  -b <branch>		package repository branch
+  -r <registry>		OCI destination registry
+  -t <task id>		task id
   --latest		also tag this image as latest
   --push		push the image to the registry after build
   --skip-build		if push is true, then skip the build stage
   --dry-run		only print what would be done
   --prefix <prefix>	image name prefix
   --help		show this text and exit
+
+Notes:
+  The image is only pushed to the destination registry
+  if the option --push is present.
 EOF
 )"