Dockerfile

FROM ubuntu:latest as builder

# Testing: gosu
#RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing/" >> /etc/apk/repositories \
#    && apk add --update --no-cache gnupg gosu gcompat libgcc
RUN apt update \
    && apt install -y --no-install-recommends \
        ca-certificates \
        wget \
        gnupg \
    && apt clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

ARG VERSION=0.21.0
ARG ARCH=x86_64
ARG BITCOIN_CORE_SIGNATURE=01EA5486DE18A882D4C2684590C8019E36C2E964

# We will be verifying pkg signature from main website, we will fetch, verify, and extract to Docker image
RUN cd /tmp \
    && wget https://bitcoincore.org/bin/bitcoin-core-${VERSION}/SHA256SUMS.asc \
    && gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys ${BITCOIN_CORE_SIGNATURE} \
    && gpg --verify SHA256SUMS.asc \
    && grep bitcoin-${VERSION}-${ARCH}-linux-gnu.tar.gz SHA256SUMS.asc > SHA25SUM \
    && wget https://bitcoincore.org/bin/bitcoin-core-${VERSION}/bitcoin-${VERSION}-${ARCH}-linux-gnu.tar.gz \
    && sha256sum -c SHA25SUM \
    && tar -xzvf bitcoin-${VERSION}-${ARCH}-linux-gnu.tar.gz -C /opt \
    && ln -sv bitcoin-${VERSION} /opt/bitcoin \
    && /opt/bitcoin/bin/test_bitcoin --show_progress \
    && rm -v /opt/bitcoin/bin/test_bitcoin /opt/bitcoin/bin/bitcoin-qt

FROM ubuntu:latest
LABEL maintainer="Praveen Beniwal <pbeniwal2601@gmail.com>"

ENTRYPOINT ["docker-entrypoint.sh"]
ENV HOME /bitcoin
EXPOSE 8332 8333  
#18332 18333 18443 18444 38333 38332
VOLUME ["/bitcoin/.bitcoin"]
WORKDIR /bitcoin

ARG GROUP_ID=1000
ARG USER_ID=1000
RUN groupadd -g ${GROUP_ID} bitcoin \
    && useradd -u ${USER_ID} -g bitcoin -d /bitcoin bitcoin

COPY --from=builder /opt/ /opt/

RUN apt update \
    && apt install -y --no-install-recommends gosu \
    && apt clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
    && ln -sv /opt/bitcoin/bin/* /usr/local/bin

COPY ./btc_oneshot  /usr/local/bin/
COPY ./btc_init /usr/local/bin/
COPY ./docker-entrypoint.sh /usr/local/bin/
ENV PATH="/usr/local/bin/docker-entrypoint.sh:${PATH}" 
RUN chmod +x /usr/local/bin/docker-entrypoint.sh 
RUN chmod +x /usr/local/bin/btc_init 
RUN chmod +x /usr/local/bin/btc_oneshot

CMD ["btc_oneshot"]