Add l2-vars-example file

.gitignore

@@ -4,3 +4,4 @@ nitro-bridge-setup/out
 nitro-bridge-setup/bridge-vars.yml
 nitro-nodes-setup/nitro-vars.yml
 nitro-nodes-setup/out/
+l2-setup/l2-vars.yml

l2-setup/README.md

@@ -35,6 +35,12 @@ To run the playbooks on a remote machine, follow these steps:
 
 The following commands have to be executed in [`l2-setup`](./) directory
 
+- Copy the `l2-vars-example.yml` vars file
+
+  ```bash
+  cp l2-vars-example.yml l2-vars.yml
+  ```
+
 - Edit [`l2-vars.yml`](./l2-vars.yml) with the required values
 
   ```bash