feat: make operator_register_with_aligned_layer (#1535)

Author: uri-99

docs/operator_guides/0_running_an_operator.md

@@ -125,7 +125,15 @@ eth_ws_url: "wss://<RPC_1>"
 eth_ws_url_fallback: "wss://<RPC_2>"
 ```
 
-## Step 4 - Start the operator
+## Step 4 - Register Operator on AlignedLayer
+
+Then you must register as an Operator on AlignedLayer. To do this, you must run:
+
+```bash
+make operator_register_with_aligned_layer CONFIG_FILE=./config-files/config-operator-mainnet.yaml
+```
+
+## Step 5 - Start the operator
 
 ```bash
 ./operator/build/aligned-operator start --config ./config-files/config-operator-mainnet.yaml