Implement lighthouse audits

[rgreinho]

Issue Type

• Feature request

Current Behavior

Nothing measures the performance of our PWA.

Expected Behavior

We want to ensure that RYR meets a certain amount of criteria defined by lighthouse (caching, performance, etc.).

The CI should return the lighthouse score for the project, and fails if it goes bellow a certain threshold.

[rgreinho]

GitMate.io thinks possibly related issues are #75 (Implement Lighthouse Audits), and #76 (Add audit validations to CircleCI).

[rgreinho]

A good source of information:

• Blog post: https://offbyone.tech/lighthouse-circleci
• Repo: https://github.com/zgreen/lighthouse-circleci-example

[rgreinho]

Another example from Paul from Supercharged:

• The video
• Repo https://github.com/GoogleChrome/devsummit

[rgreinho]

This link could also be usefull to run the web server in the background on CircleCI: https://discuss.circleci.com/t/run-http-server-in-background-during-tests/3177/9.