backstage/.changeset/twelve-elephants-pay.md

@backstage/plugin-techdocs-backend, @backstage/plugin-techdocs-node, @techdocs/cli

@backstage/plugin-techdocs-backend	@backstage/plugin-techdocs-node	@techdocs/cli
minor	minor	minor

Add optional config and cli option for techdocs to specify default mkdocs plugins.