Break up Dockerfile into (additional) test and build images

docker/Dockerfile.build

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+# Builder image
+FROM rust:buster as builder
+
+RUN apt-get update && \
+	apt-get install -y --no-install-recommends \
+	make cmake g++ gcc llvm libclang-dev
+
+RUN mkdir /zebra
+WORKDIR /zebra
+
+ENV RUST_BACKTRACE 1
+ENV CARGO_HOME /zebra/.cargo/
+RUN rustc -V; cargo -V; rustup -V
+
+COPY . .
+RUN cargo build --release
+
+
+# Runner image
+FROM debian:buster-slim AS zebrad-release
+
+COPY --from=builder /zebra/target/release/zebrad /
+
+ARG CHECKPOINT_SYNC=true
+ARG NETWORK=Mainnet
+
+RUN printf "[consensus]\n" >> /zebrad.toml
+RUN printf "checkpoint_sync = ${CHECKPOINT_SYNC}\n" >> /zebrad.toml
+RUN printf "[network]\n" >> /zebrad.toml
+RUN printf "network = '${NETWORK}'\n" >> /zebrad.toml
+RUN printf "[state]\n" >> /zebrad.toml
+RUN printf "cache_dir = '/zebrad-cache'\n" >> /zebrad.toml
+RUN printf "memory_cache_bytes = 52428800\n" >> /zebrad.toml
+RUN printf "[tracing]\n" >> /zebrad.toml
+RUN printf "endpoint_addr = '0.0.0.0:3000'\n" >> /zebrad.toml
+
+EXPOSE 3000 8233 18233
+
+CMD [ "/zebrad", "-c", "/zebrad.toml", "start" ]

docker/Dockerfile.test

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+FROM rustlang/rust:nightly
+
+RUN apt-get update && \
+	apt-get install -y --no-install-recommends \
+	make cmake g++ gcc llvm libclang-dev
+
+RUN mkdir /zebra
+WORKDIR /zebra
+
+ENV RUST_BACKTRACE 1
+ENV CARGO_HOME /zebra/.cargo/
+
+RUN rustc -V; cargo -V; rustup -V
+
+EXPOSE 8233 18233
+
+COPY . .
+RUN cargo test --all --no-run
+RUN find /zebra/target/debug/deps -type f -perm 755 ! -name '*.dylib' ! -name '*.so' | sed -e 'p;s/-.*//' | xargs -n2 mv
+
+# Filtering to only run integration tests requires nightly for now
+CMD ["cargo", "+nightly", "test", "--test", "'*'", "--no-fail-fast", "--", "-Zunstable-options", "--include-ignored"]