Add a Dockerfile

Dockerfile

+# Build
+FROM fpco/stack-build:lts-14.17 as build
+
+RUN mkdir /opt/build
+COPY . /opt/build
+
+RUN cd /opt/build && stack install --system-ghc
+
+# Runtime
+FROM ubuntu:20.04
+
+RUN mkdir -p /opt/espresso
+ARG BINARY_PATH
+WORKDIR /opt/espresso
+
+RUN apt-get update && apt-get install -y \
+  ca-certificates \
+  libgmp-dev
+
+COPY --from=build /root/.local/bin/espresso .
+
+CMD ["/opt/espresso/espresso"]
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