FROM alpine:3.8

ENV PGDATA /var/lib/postgresql/data
ENV LANG en_US.utf8

RUN apk add --no-cache postgresql postgresql-contrib su-exec \
	&& install -d -o postgres -g postgres -m 700 "$PGDATA" \
	&& install -d -o postgres -g postgres -m 700 /run/postgresql

VOLUME /var/lib/postgresql/data

COPY docker-entrypoint.sh /usr/local/bin/
ENTRYPOINT ["docker-entrypoint.sh"]

EXPOSE 5432
CMD ["postgres"]