Dockerfile Parts (#428)

* De-duplicate Dockerfiles by using a bash file to concatenate common parts

Resolves #375.

Dockerfiles are still committed to the repo to avoid a dependency on bash.

* Add a CI job to confirm the committed dockerfiles are the currently generated ones

* Create dedicated Dockerfiles per processor network

Ensures the compromising of network-specific dependencies doesn't lead to a
compromise of the build process for all processors.

* Dockerfile corrections

* Correct call to build processor Docker image in tests/processor

orchestration/coins/monero/Dockerfile.monero

@@ -0,0 +1,23 @@
+FROM alpine:latest as monero
+
+# https://downloads.getmonero.org/cli/monero-linux-x64-v0.18.3.1.tar.bz2
+# Verification will fail if MONERO_VERSION doesn't match the latest
+# due to the way monero publishes releases. They overwrite a single hashes.txt
+# file with each release, meaning we can only grab the SHA256 of the latest
+# release.
+# Most publish a asc file for each release / build architecture ¯\_(ツ)_/¯
+ENV MONERO_VERSION=0.18.3.1
+
+RUN apk --no-cache add gnupg
+
+# Download Monero
+RUN wget https://downloads.getmonero.org/cli/monero-linux-x64-v${MONERO_VERSION}.tar.bz2
+
+# Verify Binary -- fingerprint from https://github.com/monero-project/monero-site/issues/1949
+ADD ./temp/hashes-v${MONERO_VERSION}.txt .
+RUN gpg --keyserver hkp://keyserver.ubuntu.com:80 --keyserver-options no-self-sigs-only --receive-keys 81AC591FE9C4B65C5806AFC3F0AF4D462A0BDF92 && \
+  gpg --verify hashes-v${MONERO_VERSION}.txt && \
+  grep "$(sha256sum monero-linux-x64-v${MONERO_VERSION}.tar.bz2 | cut -c 1-64)" hashes-v${MONERO_VERSION}.txt
+
+# Extract it
+RUN tar -xvjf monero-linux-x64-v${MONERO_VERSION}.tar.bz2 --strip-components=1