Jellyfin-Roku is a local client for your roku devices allowing you to connect to a local jellyfin server.
Currently Jellyfin-Roku connects you to your server through http.
First enable developer mode on your Roku device:
http://sdkdocs.roku.com/display/sdkdoc/Developer+Guide
Then, zip up the source code directory. Visit YOUR-ROKU-IP in your browser, updating the IP address with the IP of the Roku device. From here you can upload the zip to the device.
To debug, use any telnet client on port 8085 of the Roku. In windows, open a command promt:
telnet YOUR-ROKU-IP 8085