Update README.md of apps/agent (#78)

Signed-off-by: Montse Ortega <[email protected]>

apps/agent/README.md

@@ -30,4 +30,7 @@ export default {
 - Install [eslint-plugin-react](https://github.com/jsx-eslint/eslint-plugin-react) and add `plugin:react/recommended` & `plugin:react/jsx-runtime` to the `extends` list
 
 ## bundle creation
-We can create a TGZ file executing `yarn bundle` and the file generated can be consumed by other projects like [migration-planner](https://github.com/kubev2v/migration-planner).
+We can create a TGZ file executing `yarn bundle` and the file generated can be consumed by oher projects like [migration-planner](https://github.com/kubev2v/migration-planner).
+
+## bundle creation on push to main
+With the .github/workflows/push-to-main.yaml action the TGZ file is automatically generated when we push to main branch changes related with agent folder.