hydrogen-docker/config.json

{
  "push": {
    "appId": "io.element.hydrogen.web",
    "gatewayUrl": "https://sudo.is",
    "applicationServerKey": "BC-gpSdVHEXhvHSHS0AzzWrQoukv2BE7KzpoPO_FfPacqOo3l1pdqz7rSgmB04pZCWaHPz7XRe6fjLaC-WPDopM"
  },
  "defaultHomeServer": "sudo.is"
}