docs: update readme (#27)

README.md

@@ -1,22 +1,20 @@
 # OP Chain Deployment
 
-## Setup environment variables
+## Fetch and update the submodules
 
 ```
-cp .env.example .env
-cp .env.explorer.example .env.explorer
-cp .env.bridge.example .env.bridge
+git submodule update --init --recursive
 ```
 
-### Fetch and update the submodules
+## Setup environment variables
 
 ```
-git submodule update --init --recursive
+cp .env.example .env
+cp .env.explorer.example .env.explorer
+cp .env.bridge.example .env.bridge
 ```
 
-### Update the environment variables
-
-Update environment variables in the `.env` files.
+Then update environment variables in the `.env` files.
 
 ## Local L1 chain