lightkeeper(custom).json

{
  "baseUrl": "https://example.com",
  "ci": "[ci]",
  "type": "[type]",
  "settings": {
    "categories": {
      "pwa": {
        "target": 90,
        "threshold": 40,
        "warning": 10
      }
    }
  },
  "sharedSettings": {
    "galleries": {
      "extends": true,
      "categories": {
        "pwa": {
          "threshold": 20
        }
      },
      "lighthouse": {
        "options": {
          "emulatedFormFactor": "desktop",
          "extraHeaders": {
            "X-CUSTOM-HEADER": "gallery-header"
          }
        }
      }
    }
  },
  "routes": [
    "/article/1/",
    {
      "url": "gallery/1",
      "settings": "galleries"
    },
    {
      "url": "gallery/2",
      "settings": {
        "extends": "galleries",
        "categories": {
          "pwa": {
            "target": 80
          }
        }
      }
    }
  ]
}