Image snapshot the static website

[zadigus]

This is related to #145. Working on that issue raised a few new issues, in particular with image snapshotting the static website during our e2e tests. I was not able to make those image snapshots happen, probably because of core-js2 / core-js3 incompatibilities.

• https://github.com/meinaart/cypress-plugin-snapshots#usage-for-image-snapshots
• https://github.com/palmerhq/cypress-image-snapshot