Update docs to 1.1 of sandbox

docs/build/iota-sandbox/docs/getting-started.md

@@ -46,10 +46,11 @@ mkdir iota-sandbox && cd iota-sandbox && curl -L https://github.com/iotaledger/i
 
 #### Set Up Your Environment
 
-In most cases the default setup should be enough. But you can edit the `.env` file to configure some optional settings:
+In most cases the default setup should be enough. So you can just do `cp .env.example .env` to use the default setup.
+But you can also edit the `.env` file to configure some optional settings:
 
 ```sh reference
-https://github.com/iotaledger/iota-sandbox/blob/main/sandbox/.env
+https://github.com/iotaledger/iota-sandbox/blob/main/sandbox/.env.example
 ```
 
 #### Bootstrap