Unfortunately the development of UWC was discontinued. Therefore the following preparation steps are required to migrate
a current version of Foswiki to Confluence with UWC:
Replace <verbatim>...</verbatim> to %CODE%...%ENDCODE% tags
Convert base64 inline images to image files in Foswiki's /pub folder
foswiki-uwc-prepare takes over these steps on all Foswiki pages in the /data folder.