Introduce basic lighthouse-ci

Author: plesiecki

.github/workflows/lighthouse.yml

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+name: Lighthouse CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request: ~
+  workflow_dispatch: ~
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [ 14.x ]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Cache Node.js modules
+        uses: actions/cache@v2
+        with:
+          path: ~/.npm
+          key: ${{ runner.OS }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.OS }}-node-
+            ${{ runner.OS }}-
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Run Lighthouse CI
+        run: |
+          npm install -g @lhci/[email protected]
+          lhci autorun
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: lighthouse-report
+          path: ./lhci/*

lighthouserc.js

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+module.exports = {
+    ci: {
+        collect: {
+            url: ['http://localhost:9090/#covid19/'],
+            startServerCommand: 'npm run start:examples',
+            numberOfRuns: 5,
+        },
+        upload: {
+            target: 'filesystem',
+            outputDir: 'lhci'
+        },
+    },
+};