meta: add ENV DEBIAN_FRONTEND=noninteractive...

... so that apt will not ask for user input

linux-clang-format/Dockerfile

@@ -1,4 +1,5 @@
 FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get -y full-upgrade
 RUN apt-get install -y git clang-format-6.0 p7zip-full

linux-flatpak/Dockerfile

@@ -1,5 +1,6 @@
 FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get -y full-upgrade
 RUN apt-get install -y p7zip-full wget git flatpak flatpak-builder ca-certificates sshfs curl fuse dnsutils gnupg2 sudo
 RUN flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo

linux-fresh/Dockerfile

@@ -1,4 +1,5 @@
 FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get -y full-upgrade
 RUN apt-get install -y p7zip-full build-essential libsdl2-dev qtbase5-dev libqt5opengl5-dev qtmultimedia5-dev qttools5-dev qttools5-dev-tools libavcodec-dev libavfilter-dev libavformat-dev libswscale-dev wget git ccache cmake ninja-build

linux-frozen/Dockerfile

@@ -1,5 +1,6 @@
 FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN mkdir -p /tmp/pkgs
 COPY install_package.py /tmp/pkgs
 RUN apt-get update && apt-get install -y p7zip-full build-essential wget git python-launchpadlib ccache ninja-build

linux-mingw/Dockerfile

@@ -1,5 +1,6 @@
 FROM ubuntu:20.04
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN mkdir -p /tmp/pkgs
 RUN apt-get update && apt-get install -y gpg wget git python3-pip ccache p7zip-full g++-mingw-w64-x86-64 gcc-mingw-w64-x86-64 mingw-w64-tools cmake ninja-build
 # workaround broken headers in Ubuntu MinGW package

linux-transifex/Dockerfile

@@ -1,5 +1,6 @@
 FROM debian:buster-slim
 LABEL maintainer="citraemu"
+ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get -y full-upgrade
 RUN apt-get install -y p7zip-full libqt5opengl5-dev qtmultimedia5-dev qttools5-dev qttools5-dev-tools python3-pip cmake
 RUN pip3 install transifex-client