libseafile-dev 6.1.5-1 (arm64 binary) in ubuntu bionic

 Seafile enables you to build private cloud for file sharing and
 collaboration among team members in your company/organization. This
 is the Linux desktop client of the seafile system.
 .
 First you create a file library in the web and upload files to
 it. Then you share it into a team or with another user.
 .
 File libraries can also be synchronized among computers and mobile
 devices. You download a library to your PC. Whenever you add, delete
 or edit a file, the latest version be uploaded to the server
 automatically and then be synchronized to everyone's computer.
 .
 This package contains the development libraries.