add example to readme

README.md

@@ -1,2 +1,22 @@
 # mirror-action
 A GitHub Action for mirroring your repository to a different remote repository
+
+This project is [mirrored on GitLab](https://gitlab.com/spyoungtech/mirror-action)
+
+## Example workflow
+
+```workflow
+workflow "Mirror Workflow" {
+  on = "push"
+  resolves = ["Mirror Action"]
+}
+
+action "Mirror Action" {
+  uses = "spyoungtech/mirror-action@master"
+  secrets = ["GIT_PASSWORD"]
+  args = "https://gitlab.com/spyoungtech/mirror-action.git"
+  env = {
+    GIT_USERNAME = "spyoungtech"
+  }
+}
+```

entrypoint.sh

@@ -7,6 +7,5 @@ sh -c "git config --global credential.username $GIT_USERNAME"
 sh -c "git config --global core.askPass /cred-helper.sh"
 sh -c "git config --global credential.helper cache"
 sh -c "git remote add mirror $*"
-sh -c "git remote set-url $*"
 sh -c "echo pushing to $branch branch at $(git remote get-url --push mirror)"
 sh -c "git push mirror $branch"