launch.json

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "pwa-node",
      "request": "launch",
      "name": "Launch Program",
      "skipFiles": ["<node_internals>/**"],
      "args": ["${input:myDynamicParameter}"],
      "program": "${workspaceFolder}/main.js",
      "preLaunchTask": "myPreBuildTask"
    }
  ],
  "inputs": [
    {
      "id": "myDynamicParameter",
      "type": "command",
      // always require selection
      "command": "dynamic-inputs.write",
      "args": {
        "command": "bash",
        "args": ["${workspaceFolder}/populate.sh"],
        // memoize the selection to pass to myPreBuildTask
        "var": "myDynamicParameter",
        // map options to values
        "unwrap": "$[*].value",
        "serializer": "plain",
        "quickPickOptions": {
          "canPickMany": true,
          "ignoreFocusOut": true,
          "placeHolder": "Please select an option",
          "title": "Parameter"
        }
      }
    }
  ]
}