Add codeclimate prefix env to readme (!30) · Merge requests · GitLab.org / Ops Sub-Department / codequality · GitLab

Ref: gitlab-org/gitlab#228874 (closed)

What does this MR do?

This MR adds our new CODECLIMATE_PREFIX environment variable to our README.

It was introduced in !13 (merged)

What are the relevant issue numbers?

cc @drewcimino @iamricecake