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Description
Since moving to CircleCI for dredd tests, docs are not being deployed to gh-pages, which means that new changes in docs are not tracked. However, we want to store docs in the deployed server itself in the future, it is not apparent how to tackle it right now without increasing the size of repo too much due to constant git diffs - #4548
So, we need to deploy built docs to gh-pages directory from CircleCI as it was done in Travis CI