It's a very heavily customized Debian fork that uses Upstart. It can be done but will not run very good if you have multiple users login to it. Even the best Synology servers only have a max of 8gb of ram and the cpu is an Atom based processor, the same found in low end tablets and chromebooks. I have a DS216j and RS2416+ and tried it on both. After 3 connections, it started to lag so bad it was not worth it(even on a closed lan connection).
To answer your question, you would have to do it from the CLI and hope that all dependencies are installed already with the core OS.
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