Geth Lighthouse drop down 2

Author: varnarmat

lib/ethereum/README.md

@@ -99,7 +99,17 @@ Configure  your setup.
 
 <summary>Geth Lighthouse</summary>
 
-<details>
+To specify the Ethereum client combination you wish to deploy, create your own copy of `.env` file and edit it using your preferred text editor. The contents of your file for a Geth / Lighthouse node deployment is as follows, which uses a sample config from the repository:
+```bash
+# Make sure you are in aws-blockchain-node-runners/lib/ethereum
+cd lib/ethereum
+pwd
+cp ./sample-configs/.env-geth-lighthouse .env
+nano .env
+```
+> **NOTE:** *You can find more examples inside the `sample-configs` directory, which illustrate other Ethereum client combinations.*
+
+</details>
 
 | Execution Layer Client | Consensus Layer Client | Documentation Link |
 | --- | --- | --- |