Do not remove previous commit_tag

yarn-project/Dockerfile.prod

@@ -8,6 +8,7 @@ RUN apt update && apt install -y jq && rm -rf /var/lib/apt/lists/* && apt-get cl
 COPY --from=yarn-project /usr/src /usr/src
 WORKDIR /usr/src/yarn-project
 # TODO: Use release-please to update package.json directly, and remove this!
+ARG COMMIT_TAG=""
 RUN ./scripts/version_packages.sh
 # Productionify. See comment in yarn-project-base/Dockerfile.
 RUN yarn workspaces focus @aztec/cli @aztec/aztec-sandbox @aztec/aztec-faucet @aztec/aztec.js --production && \