Boxxy Terminal Request

Project information:

Name: Boxxy Homepage: GitHub - miifrommera/boxxy: A Terminal for GNOME · GitHub License: Proprietary Upstream has been contacted: I’m the developer

Hello, I want to ask for possible ways to publish in Flathub a proprietary app. Basically the app will get open source, but till then;

That’s my build YML

app-id: play.mii.Boxxy
runtime: org.gnome.Platform
runtime-version: "master"
sdk: org.gnome.Sdk
sdk-extensions:
    - org.freedesktop.Sdk.Extension.rust-stable
command: boxxy-terminal

finish-args:
    - --allow=devel
    - --device=dri
    - --filesystem=host
    - --share=ipc
    - --share=network
    - --socket=fallback-x11
    - --socket=wayland
    - --socket=session-bus
    - --socket=pulseaudio
    - --talk-name=org.freedesktop.Flatpak

cleanup:
    - /etc
    - /include
    - /lib/pkgconfig
    - /share/doc
    - /share/gir-1.0
    - /share/gtk-doc
    - /share/man
    - /share/pkgconfig
    - "*.la"
    - "*.a"

build-options:
    append-path: /usr/lib/sdk/rust-stable/bin
    env:
        CARGO_HOME: /run/build/boxxy-terminal/cargo

modules:
    - name: boxxy-terminal
      buildsystem: simple
      build-commands:
          - cargo --offline fetch --manifest-path Cargo.toml
          - cargo --offline build --release --manifest-path Cargo.toml
          - install -Dm755 target/release/boxxy-terminal -t /app/bin/
          - install -Dm755 target/release/boxxy-agent -t /app/libexec/
          - install -Dm644 resources/icons/play.mii.Boxxy.png
            /app/share/icons/hicolor/256x256/apps/play.mii.Boxxy.png
          - install -Dm644 flatpak/play.mii.Boxxy.desktop
            /app/share/applications/play.mii.Boxxy.desktop
          - install -Dm644 flatpak/play.mii.Boxxy.metainfo.xml
            /app/share/metainfo/play.mii.Boxxy.metainfo.xml
      sources:
          - type: dir
            path: ..
          - cargo-sources.json

The app runs a boxxy-agent outside the Flatpak sandbox, similar to Ptyxis, and basically has full access to the system. I already have setup a Flathub repo https://miifrommera.github.io/boxxy-flatpak-remote/repo so I was wondering if I could somehow publish directly from it, and how? Another way is a .zip from Github releases

Suggestions?