Make snippets collaborative documents
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=14127) </details> <!--IssueSummary end--> It would be great if we could replace Google docs by making Snippets collaborative documents. Maybe we could use something like: - http://etherpad.org/ - https://firepad.io/ (powered by Firebase, so maybe not so useful) cc @sytses @dzaporozhets @DouweM @stanhu
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