Update hero_docs/crystallib_hero_basic_docs.md

hero_docs/crystallib_hero_basic_docs.md

@@ -24,6 +24,16 @@ We provide the steps to prepare a Docker Ubuntu container to work with Hero and
 sudo docker run -it --net=host --name=hero-container -v ~/code:/root/code ubuntu:latest /bin/bash
 ```
 
+- If you want to set the SSH key, do the following
+   - Create Directory .ssh in container
+   ```
+   mkdir -p ~/.ssh
+   ```
+   - Copy SSH keys to container from local machine (use the proper path and key type)
+   ```
+   sudo docker cp ~/.ssh/id_ed25519 hero-container:/root/.ssh/id_ed25519
+   sudo docker cp ~/.ssh/id_ed25519.pub hero-container:/root/.ssh/id_ed25519.pub
+   ```
 - Execute all commands directly in the container
 
 ```