[client] Add dockerfile for client

This aleviates the trouble community members have been having with
dependency management, especially with regards to protobuf.

docker/client/client.Dockerfile

@@ -0,0 +1,33 @@
+### Build Image ###
+FROM debian:stretch as builder
+
+RUN echo "deb http://deb.debian.org/debian stretch-backports main" > /etc/apt/sources.list.d/backports.list && apt-get update && apt-get install -y protobuf-compiler/stretch-backports cmake golang curl && apt-get clean && rm -r /var/lib/apt/lists/*
+
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain none
+ENV PATH "$PATH:/root/.cargo/bin"
+
+WORKDIR /libra
+COPY rust-toolchain /libra/rust-toolchain
+RUN rustup install $(cat rust-toolchain)
+
+COPY . /libra
+RUN cargo build --release -p client
+
+### Production Image ###
+FROM debian:stretch
+
+RUN mkdir -p /opt/libra/bin /opt/libra/etc
+COPY --from=builder /libra/target/release/client /opt/libra/bin/libra_client
+COPY --from=builder /libra/scripts/cli/trusted_peers.config.toml /opt/libra/etc/trusted_peers.config.toml
+
+ENTRYPOINT exec /opt/libra/bin/libra_client
+CMD --host ac.testnet.libra.org --port 8000 -s /opt/libra/etc/trusted_peers.config.toml
+
+ARG BUILD_DATE
+ARG GIT_REV
+ARG GIT_UPSTREAM
+
+LABEL org.label-schema.schema-version="1.0"
+LABEL org.label-schema.build-date=$BUILD_DATE
+LABEL org.label-schema.vcs-ref=$GIT_REV
+LABEL vcs-upstream=$GIT_UPSTREAM