basic docker-compose cluster

docker/Dockerfile

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+FROM archlinux/base
+
+RUN pacman -Sy --noconfirm shards crystal imagemagick librsvg \
+    which pkgconf gcc ttf-liberation
+# base-devel contains many other basic packages, that are normally assumed to already exist on a clean arch system
+
+ADD . /invidious
+
+WORKDIR /invidious
+
+RUN sed -i 's/host: localhost/host: postgres/' config/config.yml && \
+    shards && \
+    crystal build src/invidious.cr
+
+CMD [ "/invidious/invidious" ]

docker/Dockerfile.postgres

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+FROM postgres:10
+
+ENV POSTGRES_USER postgres
+
+ADD ./setup.sh /setup.sh
+ADD ./config/sql /config/sql
+ADD ./docker/entrypoint.postgres.sh /entrypoint.sh
+
+ENTRYPOINT [ "/entrypoint.sh" ]
+CMD [ "postgres" ]

docker/entrypoint.postgres.sh

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+#!/usr/bin/env bash
+
+CMD="$@"
+if [ ! -f /var/lib/postgresql/data/setupFinished ]; then
+    echo "### first run - setting up invidious database"
+    /usr/local/bin/docker-entrypoint.sh postgres &
+    sleep 10
+    until runuser -l postgres -c 'pg_isready' 2>/dev/null; do
+        >&2 echo "### Postgres is unavailable - waiting"
+        sleep 5
+    done
+    >&2 echo "### importing table schemas"
+    su postgres -c "/setup.sh" && touch /var/lib/postgresql/data/setupFinished
+    echo "### invidious database setup finished"
+    exit
+fi
+
+echo "running postgres /usr/local/bin/docker-entrypoint.sh $CMD"
+exec /usr/local/bin/docker-entrypoint.sh $CMD