Deploying docs

This is for maintainers of IOV-Core only.

How to publish docs

Note: Those steps are done automatically in the CI

1. Make sure iov-core and iov-core-docs are checked out in the same parent folder.
2. Checkout branch gh-pages in iov-core-docs. Caution: force pushing is done on that branch
3. In iov-core do yarn install && yarn build && yarn docs && ./copy_docs.sh
4. In iov-core-docs do git reset master && git add ./latest && git commit -m "Update docs"
5. Review what you just did and force push gh-pages to origin