docker-magento/compose/.vscode/launch.json

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Listen for XDebug",
      "type": "php",
      "request": "launch",
      "pathMappings": {
        "/var/www/html": "${workspaceFolder}"
      },
      "port": 9001,
      "xdebugSettings": {
        "idekey": "VSCODE"
      }
    }
  ]
}