Dockerfile.alpine

# Author: Satish Gaikwad <satish@satishweb.com>
# Author: DNS.SB <admin@dns.sb>
FROM golang:1.23-alpine AS doh-build
LABEL MAINTAINER admin@dns.sb

RUN apk add --no-cache git make jq curl

WORKDIR /src

# Lets download latest version of DOH
RUN set -x ;\
    DOH_VERSION_LATEST=v2.3.7 \
    && curl -L "https://github.com/m13253/dns-over-https/archive/${DOH_VERSION_LATEST}.zip" -o doh.zip \
    && unzip doh.zip \
    && rm doh.zip \
    && cd dns-over-https* \
    && make doh-server/doh-server \
    && mkdir /dist \
    && cp doh-server/doh-server /dist/doh-server \
    && echo ${DOH_VERSION_LATEST} > /dist/doh-server.version

FROM alpine:3.20
LABEL MAINTAINER admin@dns.sb

COPY --from=doh-build /dist /server
COPY doh-server.sample.conf /server/doh-server.sample.conf

# Install required packages by docker-entrypoint
RUN apk add --no-cache bash gettext curl

# Add docker entrypoint and make it executable
ADD docker-entrypoint /docker-entrypoint
RUN chmod u+x /docker-entrypoint

# Change owner of the server folder
RUN chown -R nobody:nogroup /server

# Tell docker that all future commands should run as nobody
USER nobody

# Set environment defaults
# We are using DNS.SB DNS server address as default
# Here is the list of addresses: https://dns.sb/guide/
ENV UPSTREAM_DNS_SERVER="udp:185.222.222.222:53"
ENV DOH_HTTP_PREFIX="/getnsrecord"
ENV DOH_SERVER_LISTEN=":8053"
ENV DOH_SERVER_TIMEOUT="10"
ENV DOH_SERVER_TRIES="3"
ENV DOH_SERVER_VERBOSE="false"

EXPOSE 8053

ENTRYPOINT ["/docker-entrypoint"]
CMD [ "/server/doh-server", "-conf", "/server/doh-server.conf" ]