How to open shell script in a GitHub Codespaces devcontainer within the VS Code shell?

Question

The following file is within .devcontainer/devcontainer.json:

// See https://containers.dev/implementors/json_reference/ for configuration reference
{
 "name": "my-devcontainer",
 "build": {
 "dockerfile": "Dockerfile"
 },
 "postCreateCommand": "bash ./my-background-script.sh && bash ./my-foreground-script.sh",
 "remoteUser": "node"
}

Note the postCreateCommand:

1. I would like my-foreground-script.sh to run the VS Code terminal
   • need this script to be visible
   • it is interactive, and the user must be able to type inputs into it
2. I would like my-background-script.sh to run separately
   • it may run as a background task, invisible to the user
   • it may also run in the VS Code terminal, visible to the user
   • where it runs does not matter

Right now, both scripts run in the background, so 2. is OK, but 1. is not. How can I configure .devcontainer/devcontainer.json such that the above happens?