What is the correct process to get the known_hosts imported into the devcontainer system?

When I used VSCode and devcontainers, the ~/.ssh/known_hosts is copied into the devcontainer.

```
[214707 ms]
[214708 ms] Start: Run in container: # Test for /home/aos-dev/.ssh/known_hosts and ssh
[214765 ms] /home/aos-dev
[214765 ms]
[214765 ms] Start: Run in container: cat <<'EOF-/tmp/vscode-remote-containers-a23332a1-cce6-48d4-8d54-2a61e610e554.js' >/tmp/vscode-remote-containers-a23332a1-cce6-48d4-8d54-2a61e610e554.js
[214808 ms]
[214809 ms]
[214809 ms] Start: Run in container: # Copy /net/spindles/ykoehler/.ssh/known_hosts to /home/aos-dev/.ssh/known_hosts
[214862 ms]
[214862 ms]
[215007 ms]
```

When I use the CLI devcontainer command "up" and "exec" I do not see any similar statements.

This results in my CI not being able to build as it cannot connect to the same SSH destination as the VSCode users.

Need help on this.