Set default networks list on app start (#21)

Part of https://www.notion.so/Simplify-login-flow-in-deploy-laconic-com-190a6b22d47280a9924cc38f8cf4c891

Co-authored-by: IshaVenikar <ishavenikar7@gmail.com>
Reviewed-on: cerc-io/laconic-wallet-web#21
Co-authored-by: Nabarun <nabarun@deepstacksoft.com>
Co-committed-by: Nabarun <nabarun@deepstacksoft.com>

stack/stack-orchestrator/stack/laconic-wallet-web/README.md

@@ -66,7 +66,7 @@ Instructions for running the `laconic-wallet-web` using [laconic-so](https://git
 
   # Deploy app URL used for checking origin of the messages for auto-sign-in route
   # Deploy app repo: https://git.vdb.to/cerc-io/snowballtools-base
-  REACT_APP_DEPLOY_APP_URL=
+  CERC_DEPLOY_APP_URL=
   ```
 
 ## Start the deployment