* fix: fix internal service filename in 08-service section
* fix: typo
* fix: fix markdownlint in CI
* fix: typo
* fix: typo
* fix: `environment variables`, not `environmental`
* fix: typo & missing punctuation
* fix: `much` not `many`
* fix: `lets` not `let's`
* fix: typo
* fix: typo
* fix: phrasing
* fix: typo
* fix: typo
* fix: mysql operator manifest api version
got this error while trying to run it as is:
error: unable to recognize "20-operators/01-mysql-operator.yml": no matches for
kind "Deployment" in version "apps/v1beta1"
* fix: spelling