Change MinGW docker to use ArchLinux as base

This is needed to get more up-to-date MinGW releases

dockerfiles/mingw-arch/Dockerfile

@@ -0,0 +1,76 @@
+FROM nfnty/arch-mini:latest
+
+# Based on https://github.com/haffmans/docker-mingw-qt5/blob/master/Dockerfile
+
+# Update base system
+RUN    pacman -Sy --noconfirm --noprogressbar archlinux-keyring \
+    && pacman-key --populate \
+    && pacman -Su --noconfirm --noprogressbar pacman \
+    && pacman-db-upgrade \
+    && pacman -Su --noconfirm --noprogressbar ca-certificates \
+    && trust extract-compat \
+    && pacman -Syyu --noconfirm --noprogressbar \
+    && (echo -e "y\ny\n" | pacman -Scc)
+
+# Install yaourt
+RUN echo "[archlinuxfr]" >> /etc/pacman.conf && \
+    echo "SigLevel = Never" >> /etc/pacman.conf && \
+    echo "Server = http://repo.archlinux.fr/x86_64" >> /etc/pacman.conf &&\
+    pacman -Sy
+
+# Add some useful packages to the base system
+RUN pacman -S --noconfirm --noprogressbar \
+        make \
+        git \
+        sudo \
+        wget \
+        yaourt \
+        awk \
+        sudo \
+        fakeroot \
+        file \
+        patch \
+    && (echo -e "y\ny\n" | pacman -Scc)
+
+# Add mingw-repo
+RUN    echo "[mingw-w64]" >> /etc/pacman.conf \
+    && echo "SigLevel = Optional TrustAll" >> /etc/pacman.conf \
+    && echo "Server = http://downloads.sourceforge.net/project/mingw-w64-archlinux/\$arch" >> /etc/pacman.conf \
+    && pacman -Sy
+
+# Install MingW packages
+RUN pacman -S --noconfirm --noprogressbar \
+        mingw-w64-binutils \
+        mingw-w64-crt \
+        mingw-w64-gcc \
+        mingw-w64-headers \
+        mingw-w64-winpthreads \
+        mingw-w64-cmake \
+        mingw-w64-fontconfig \
+        mingw-w64-freetype2 \
+        mingw-w64-libiconv \
+        mingw-w64-libpng \
+        mingw-w64-openssl \
+        mingw-w64-pkg-config \
+        mingw-w64-sdl2 \
+        mingw-w64-tools \
+        mingw-w64-zlib \
+        mingw-w64-sdl2_ttf \
+        mingw-w64-curl \
+    && (echo -e "y\ny\n" | pacman -Scc)
+
+RUN useradd --create-home --comment "Arch Build User" build && \
+    groupadd sudo && \
+    echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers; \
+    echo 'Defaults:nobody !requiretty' >> /etc/sudoers; \
+    gpasswd -a build sudo
+USER build
+WORKDIR /tmp
+# Overrides from arch-base
+ENV HOME /home/build
+
+RUN yaourt -S --noconfirm --noprogressbar \
+        mingw-w64-jansson \
+        aur/mingw-w64-libzip \
+        aur/mingw-w64-speexdsp \
+    && (echo -e "y\ny\n" | sudo pacman -Scc)