Skipped tests are release blockers and fixing flaky tests isn't always
easy, especially if we assume that if a test passes locally, it will
also pass in CI.
We need to keep the differences between our local environments and CI in
mind and make appropriate changes that take these differences into
account but to do that, we first need to know what these differences
are!
This PR adds a high level description of a couple of key differences.
### Checklist
Delete any items that are not applicable to this PR.
- [X] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [x]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
---------
Co-authored-by: Alejandro Fernández Haro <afharo@gmail.com>