#syntax=docker/dockerfile:1.2 FROM ubuntu:focal RUN apt-get update RUN DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get -y install tzdata RUN apt-get install -yq curl gnupg2 flatpak flatpak-builder RUN flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo RUN flatpak install -y flathub org.freedesktop.Platform//22.08 org.freedesktop.Sdk//22.08 RUN flatpak install -y flathub org.gnome.Platform//43 org.gnome.Sdk//43