GHW for building and publishing docker images (#1391)

* add ghw and scripts for docker image deployment

* debug

* add permissions for content

* fix path to the bin folder

* add tags

* rename env

* fix path to docker file

* make polkadot-parachain executable

* fix typo

* fix more typos

* test

* revert back  use of  working directory

* mke bin executable in the artifacts folder

* use cd instead of working directory

* change path to cash

* fix path to cash

* change cache key

* delete old flows

* addressed PR comments

* fix path

* reorg docker files

docker/dockerfiles/polkadot/polkadot_injected_release.Dockerfile

@@ -0,0 +1,53 @@
+FROM docker.io/library/ubuntu:20.04
+
+# metadata
+ARG VCS_REF
+ARG BUILD_DATE
+ARG POLKADOT_VERSION
+ARG POLKADOT_GPGKEY=9D4B2B6EB8F97156D19669A9FF0812D491B96798
+ARG GPG_KEYSERVER="keyserver.ubuntu.com"
+
+LABEL io.parity.image.authors="devops-team@parity.io" \
+	io.parity.image.vendor="Parity Technologies" \
+	io.parity.image.title="parity/polkadot" \
+	io.parity.image.description="Polkadot: a platform for web3. This is the official Parity image with an injected binary." \
+	io.parity.image.source="https://github.com/paritytech/polkadot/blob/${VCS_REF}/docker/dockerfiles/polkadot/polkadot_injected_release.Dockerfile" \
+	io.parity.image.revision="${VCS_REF}" \
+	io.parity.image.created="${BUILD_DATE}" \
+	io.parity.image.documentation="https://github.com/paritytech/polkadot/"
+
+# show backtraces
+ENV RUST_BACKTRACE 1
+
+# install tools and dependencies
+RUN apt-get update && \
+	DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+		libssl1.1 \
+		ca-certificates \
+		gnupg && \
+	useradd -m -u 1000 -U -s /bin/sh -d /polkadot polkadot && \
+# add repo's gpg keys and install the published polkadot binary
+	gpg --keyserver ${GPG_KEYSERVER} --recv-keys ${POLKADOT_GPGKEY} && \
+	gpg --export ${POLKADOT_GPGKEY} > /usr/share/keyrings/parity.gpg && \
+	echo 'deb [signed-by=/usr/share/keyrings/parity.gpg] https://releases.parity.io/deb release main' > /etc/apt/sources.list.d/parity.list && \
+	apt-get update && \
+	apt-get install -y --no-install-recommends polkadot=${POLKADOT_VERSION#?} && \
+# apt cleanup
+	apt-get autoremove -y && \
+	apt-get clean && \
+	rm -rf /var/lib/apt/lists/* ; \
+	mkdir -p /data /polkadot/.local/share && \
+	chown -R polkadot:polkadot /data && \
+	ln -s /data /polkadot/.local/share/polkadot
+
+USER polkadot
+
+# check if executable works in this container
+RUN /usr/bin/polkadot --version
+RUN /usr/local/bin/polkadot-execute-worker --version
+RUN /usr/local/bin/polkadot-prepare-worker --version
+
+EXPOSE 30333 9933 9944
+VOLUME ["/polkadot"]
+
+ENTRYPOINT ["/usr/bin/polkadot"]