lighthouserc.json

{
  "ci": {
    "collect": {
      "startServerCommand": "npm run start",
      "startServerReadyPattern": "started server on",
      "url": [
        "http://localhost:3000/",
        "http://localhost:3000/about",
        "http://localhost:3000/blog",
        "http://localhost:3000/blog/i-think-im-becoming-a-cracked-engineer",
        "http://localhost:3000/organizations/slack",
        "http://localhost:3000/contact"
      ],
      "numberOfRuns": 3
    },
    "assert": {
      "preset": "lighthouse:no-pwa",
      "assertions": {
        "categories:performance": ["error", { "minScore": 0.9 }],
        "categories:accessibility": ["error", { "minScore": 0.9 }],
        "categories:best-practices": ["error", { "minScore": 0.9 }],
        "categories:seo": ["error", { "minScore": 0.95 }],
        "color-contrast": ["warn", { "minScore": 1 }],
        "errors-in-console": ["warn", { "minScore": 1 }],
        "heading-order": ["warn", { "minScore": 1 }],
        "image-redundant-alt": ["warn", { "minScore": 1 }],
        "unsized-images": ["warn", { "minScore": 1 }],
        "redirects": ["warn", { "minScore": 1 }],
        "image-delivery-insight": "off",
        "legacy-javascript-insight": "off",
        "network-dependency-tree-insight": "off",
        "lcp-discovery-insight": "off",
        "forced-reflow-insight": "off",
        "document-latency-insight": "off",
        "offscreen-images": ["warn", { "maxLength": 0 }],
        "unused-javascript": ["warn", { "maxLength": 0 }],
        "uses-responsive-images": ["warn", { "maxLength": 0 }]
      }
    }
  }
}