feat: Add Lighthouse CI

.gitignore

@@ -69,3 +69,6 @@ next-env.d.ts
 # Glean
 .venv
 /src/telemetry/generated/
+
+# Lighthouse CI
+.lighthouseci

lighthouserc.cjs

@@ -0,0 +1,20 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const SERVER_URL = "http://localhost:3000";
+const pages = ["/", "/breaches"];
+
+const lighthouseConfig = {
+  ci: {
+    collect: {
+      startServerCommand: "npm run start",
+      url: pages.map((pathname) => `${SERVER_URL}${pathname}`),
+    },
+    upload: {
+      target: "lhci",
+    },
+  },
+};
+
+module.exports = lighthouseConfig;

package.json

@@ -52,7 +52,8 @@
     "build-glean-frontend-docs": "glean translate src/telemetry/metrics.yaml --format markdown --output docs/telemetry/frontent",
     "build-glean-backend-docs": "glean translate src/telemetry/backend-metrics.yaml --format markdown --output docs/telemetry/backend",
     "loadtest:hbibp-webhook": "echo 'Ensure k6 is installed; see:\n\thttps://grafana.com/docs/k6/latest/set-up/install-k6/\n' && k6 run src/scripts/loadtest/hibp.js",
-    "validate-nimbus": "sh src/scripts/build/validate-nimbus-file.sh"
+    "validate-nimbus": "sh src/scripts/build/validate-nimbus-file.sh",
+    "lighthouse": "lhci autorun"
   },
   "repository": {
     "type": "git",