build: move dockerfile to docker directory

docker/Dockerfile

@@ -0,0 +1,96 @@
+FROM archlinux:base
+
+# image configuration
+ENV AHRIMAN_ARCHITECTURE="x86_64"
+ENV AHRIMAN_DEBUG=""
+ENV AHRIMAN_FORCE_ROOT=""
+ENV AHRIMAN_HOST="0.0.0.0"
+ENV AHRIMAN_MULTILIB="yes"
+ENV AHRIMAN_OUTPUT=""
+ENV AHRIMAN_PACKAGER="ahriman bot <ahriman@example.com>"
+ENV AHRIMAN_PACMAN_MIRROR=""
+ENV AHRIMAN_PORT=""
+ENV AHRIMAN_POSTSETUP_COMMAND=""
+ENV AHRIMAN_PRESETUP_COMMAND=""
+ENV AHRIMAN_REPOSITORY="aur"
+ENV AHRIMAN_REPOSITORY_SERVER=""
+ENV AHRIMAN_REPOSITORY_ROOT="/var/lib/ahriman/ahriman"
+ENV AHRIMAN_UNIX_SOCKET=""
+ENV AHRIMAN_USER="ahriman"
+ENV AHRIMAN_VALIDATE_CONFIGURATION="yes"
+
+# install environment
+## update pacman.conf with multilib
+RUN echo "[multilib]" >> "/etc/pacman.conf" && \
+    echo "Include = /etc/pacman.d/mirrorlist" >> "/etc/pacman.conf"
+## refresh packages, install sudo and install packages for building
+RUN pacman -Syu --noconfirm sudo && \
+    pacman -S --noconfirm --asdeps fakeroot python-tox
+## create build user
+RUN useradd -m -d "/home/build" -s "/usr/bin/nologin" build && \
+    echo "build ALL=(ALL) NOPASSWD: ALL" > "/etc/sudoers.d/build"
+COPY "docker/install-aur-package.sh" "/usr/local/bin/install-aur-package"
+## install package dependencies
+RUN pacman -S --noconfirm --asdeps \
+        devtools \
+        git \
+        pyalpm \
+        python-bcrypt  \
+        python-inflection \
+        python-pyelftools \
+        python-requests \
+        && \
+    pacman -S --noconfirm --asdeps \
+        base-devel \
+        python-build \
+        python-flit \
+        python-installer \
+        python-wheel \
+        && \
+    pacman -S --noconfirm --asdeps \
+        git \
+        python-aiohttp \
+        python-boto3 \
+        python-cerberus \
+        python-cryptography \
+        python-jinja \
+        python-systemd \
+        rsync \
+        && \
+    runuser -u build -- install-aur-package \
+        python-aioauth-client \
+        python-sphinx-typlog-theme \
+        python-webargs \
+        python-aiohttp-apispec-git \
+        python-aiohttp-cors \
+        python-aiohttp-jinja2 \
+        python-aiohttp-session \
+        python-aiohttp-security \
+        python-requests-unixsocket2
+
+## FIXME since 1.0.4 devtools requires dbus to be run, which doesn't work now in container
+COPY "docker/systemd-nspawn.sh" "/usr/local/bin/systemd-nspawn"
+
+# install ahriman
+## copy tree
+COPY --chown=build . "/home/build/ahriman"
+## create package archive and install it
+RUN cd "/home/build/ahriman" && \
+    tox -e archive && \
+    cp ./dist/*.tar.gz "package/archlinux" && \
+    cd "package/archlinux" && \
+    runuser -u build -- makepkg --noconfirm --skipchecksums && \
+    runuser -u build -- makepkg --packagelist | grep -v -- -debug- | pacman -U --noconfirm --nodeps - && \
+    cd / && rm -r "/home/build/ahriman"
+
+# cleanup unused
+RUN find "/var/cache/pacman/pkg" -type f -delete
+RUN pacman -Qdtq | pacman -Rscn --noconfirm -
+
+VOLUME ["/var/lib/ahriman"]
+
+# minimal runtime ahriman setup
+COPY "docker/entrypoint.sh" "/usr/local/bin/entrypoint"
+ENTRYPOINT ["entrypoint"]
+# default command
+CMD ["repo-update", "--refresh"]