CTRT - Improve the environments and deployments docs page

Problem to solve

The Environments and deployments page does not comply with the GitLab documentation CTRT topic types. Also, there is an opportunity to better structure the content for easier scanning.

Further details

N/A

Proposal

  • Edit all topics so that they comply with the GitLab CTRT topic types.
  • Restructure the content for easier scanning.
  • Provide brief but comprehensive definitions of environment and deployment in the page's introduction.

Who can address the issue

Anyone

Other links/references

Edited by Russell Dickenson