CI: build nightlies
This uses GNOME CI Template to build and upload flatpak bundles. See here for more info https://gitlab.gnome.org/GNOME/Initiatives/wikis/DevOps-with-Flatpak
This uses GNOME CI Template to build and upload flatpak bundles. See here for more info https://gitlab.gnome.org/GNOME/Initiatives/wikis/DevOps-with-Flatpak