Adjust pipeline setup

Should probably do some caching of node_modules so we don't have to do npm i for both the linting and test parts.

frontend/src/components/link/link.test.tsx

+import React from 'react'
+import { render, waitFor, screen } from '@testing-library/react'
+import Link from './index'
+
+
+describe('Tests for Link component', () => {
+  test('External link prefixes route link with //', async () => {
+    render(<Link external to='example.org' />)
+
+    await waitFor(() => screen.getByRole('link'))
+
+    expect(screen.getByRole('link')).toHaveAttribute('href', '//example.org')
+  })
+})
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