feat: lighthouse configuration (#10)

Author: urielsalis

.github/workflows/lighthouse.yml

@@ -0,0 +1,16 @@
+name: Lighthouse
+on: push
+jobs:
+  static-dist-dir:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22.x
+      - run: npm ci
+      - run: npm run build --if-present
+      - name: Run Lighthouse against a static dist dir.
+        uses: treosh/lighthouse-ci-action@v11
+        with:
+          configPath: "./lighthouserc.json"

lighthouserc.cjs

@@ -0,0 +1,31 @@
+module.exports = {
+    ci: {
+        collect: {
+            startServerCommand: "npm start",
+            numberOfRuns: 3,
+            url: ["http://localhost:4321/"],
+        },
+        upload: {
+            target: "temporary-public-storage",
+        },
+        assert: {
+            preset: 'lighthouse:recommended',
+            assertions: {
+                "categories:performance":
+                    ["warn", {minScore: 0.8}],
+                "categories.pwa": "off",
+            },
+        },
+        settings: {
+            onlyCategories: ["performance"],
+            chromeFlags:
+                "--headless --no-sandbox --disk-cache-size=0",
+            "throttling-method": "devtools",
+            throttling: {
+                requestLatencyMs: 70,
+                downloadThroughputKbps: 12000,
+                cpuSlowdownMultiplier: 1,
+            }
+        }
+    },
+};

lighthouserc.json

@@ -0,0 +1,7 @@
+{
+  "ci": {
+    "collect": {
+      "staticDistDir": "./dist"
+    }
+  }
+}