build: docker image and compose file

Dockerfile, script entrypoint, docker-compose.yml minimaliste.

docker/Dockerfile

+# ------------------------------------------------------------------------------
+# Build Stage
+# ------------------------------------------------------------------------------
+
+# Building for Debian buster because we need the binary to be compatible
+# with the image paritytech/ci-linux:production (currently based on
+# debian:buster-slim) used by the gitlab CI
+FROM rust:1-buster as build
+WORKDIR /root
+
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y \
+        clang
+
+# Copy source tree
+COPY . .
+
+# build duniter
+ARG threads=1
+RUN test -x build/duniter || \
+    ( \
+        CARGO_PROFILE_RELEASE_LTO="true" \
+            cargo build --release -j $threads && \
+        mkdir -p build && \
+        mv target/release/duniter build/ \
+    )
+
+# ------------------------------------------------------------------------------
+# Final Stage
+# ------------------------------------------------------------------------------
+
+FROM debian:buster-slim
+
+LABEL maintainer="Gilles Filippini <gilles.filippini@pini.fr>"
+LABEL version="0.0.0"
+LABEL description="Crypto-currency software (based on Substrate framework) to operate Ğ1 libre currency"
+
+# Intall
+COPY --from=build /root/build/duniter /usr/local/bin/duniter
+COPY docker/docker-entrypoint /usr/local/bin/
+
+# Configuration
+# rpc, rpc-ws, p2p, telemetry
+EXPOSE 9933 9944 30333 9615
+VOLUME /var/lib/duniter
+ENTRYPOINT ["docker-entrypoint"]