Build Clio with CentOS 7

.github/actions/test/Dockerfile

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+FROM cassandra:4.0.4
+
+RUN apt-get update && apt-get install -y postgresql
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

.github/actions/test/entrypoint.sh

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+#!/bin/bash
+
+pg_ctlcluster 12 main start
+su postgres -c"psql -c\"alter user postgres with password 'postgres'\""
+su cassandra -c "/opt/cassandra/bin/cassandra -R"
+sleep 90
+chmod +x ./clio_tests
+./clio_tests