ARG ALPINE_VERSION=latest
FROM alpine:${ALPINE_VERSION} AS builder

ARG APK_MIRROR=dl-cdn.alpinelinux.org

RUN sed -i "s/dl-cdn.alpinelinux.org/${APK_MIRROR}/g" /etc/apk/repositories && \
    apk add --no-cache --no-progress curl && \
    cd / && \
    wget --tries=3 -O smartdns $(curl -s https://api.github.com/repos/pymumu/smartdns/releases/latest | grep browser_download_url | egrep -o 'http.://.+/smartdns-x86_64' | head -n1)

FROM alpine:${ALPINE_VERSION}

COPY --from=builder /smartdns /usr/local/bin/
RUN chmod +x /usr/local/bin/smartdns

COPY smartdns.conf /etc/smartdns/

VOLUME ["/smartdns"]

EXPOSE 53/udp 53

ENTRYPOINT ["smartdns", "-f", "-c", "/etc/smartdns/smartdns.conf"]