Comment (by Roland Haas):

We are not really bound to Bitbucket and could also use GitHub, where one can eg resize images by using regular <img> tags in markdown (bitbucket does not let one do that). See https://github.com/rhaas80/wikitest/wiki

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2256/transfer-et-wiki-from-mediawiki-to