Add lighthouse to netlify

[jarrodmillman]

https://deploy-preview-101--scientific-python-hugo-theme.netlify.app/reports/lighthouse.html

Here is the plugin we are using:
https://github.com/netlify-labs/netlify-plugin-lighthouse

I had to do two things:

1. Installed plugin in the Netlify UI from this direct in-app installation link.
2. Add this

[[plugins]]
  package = "@netlify/plugin-lighthouse"

  # optional, fails build when a category is below a threshold
  [plugins.inputs.thresholds]
    performance = 0.6
    accessibility = 0.9
    best-practices = 0.9
    seo = 0.9
    pwa = 0.2

  # optional, deploy the lighthouse report to a path under your site
  [plugins.inputs]
    output_path = "reports/lighthouse.html"

to netlify.toml. I changed performance = 0.9 and pwa = 0.9 to performance = 0.6 and pwa = 0.2 b/c otherwise the CI failed. We should adjust the thresholds as we improve the theme.

[netlify]

✔️ Deploy Preview for scientific-python-hugo-theme ready!

🔨 Explore the source changes: a1687dc

🔍 Inspect the deploy log: https://app.netlify.com/sites/scientific-python-hugo-theme/deploys/61f313df897ced00078fa660

😎 Browse the preview: https://deploy-preview-101--scientific-python-hugo-theme.netlify.app

[tupui]

Oh sounds better! I did not think about checking such options.