Add Dockerfile

Dockerfile

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+# This file is sourced from https://github.com/paritytech/polkadot/blob/master/scripts/ci/dockerfiles/polkadot/polkadot_builder.Dockerfile
+# This is the build stage for polkadot-parachain. Here we create the binary in a temporary image.
+FROM docker.io/paritytech/ci-linux:production as builder
+
+WORKDIR /origintrail-parachain
+COPY . /origintrail-parachain
+
+RUN rustup default nightly && cargo build --release
+
+# This is the 2nd stage: a very small image where we copy the Polkadot binary."
+FROM docker.io/library/ubuntu:20.04
+
+COPY --from=builder /origintrail-parachain/target/release/origintrail-parachain /usr/local/bin
+COPY --from=builder /origintrail-parachain/res/origintrail-parachain-2043-raw.json /config/origintrail-parachain-2043-raw.json
+
+RUN useradd -m -u 1000 -U -s /bin/sh -d /origintrail-parachain origintrail-parachain && \
+    mkdir -p /data /origintrail-parachain/.local/share && \
+    chown -R origintrail-parachain:origintrail-parachain /data && \
+    ln -s /data /origintrail-parachain/.local/share/origintrail-parachain && \
+# unclutter and minimize the attack surface
+    rm -rf /usr/bin /usr/sbin && \
+# check if executable works in this container
+    /usr/local/bin/origintrail-parachain --version
+
+USER origintrail-parachain
+
+EXPOSE 30333 9933 9944 9615
+VOLUME ["/data"]
+
+ENTRYPOINT ["/usr/local/bin/origintrail-parachain"]