Init project

Co-authored-by: Clément Reniers <VirisOnGithub@users.noreply.github.com>

images/SQL_Dockerfile

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+FROM mariadb:latest AS builder
+
+COPY db_init.sql /docker-entrypoint-initdb.d/
+
+# That file does the DB initialization but also runs mysql daemon, by removing the last line it will only init
+RUN ["sed", "-i", "s/exec \"$@\"/echo \"not running $@\"/", "/usr/local/bin/docker-entrypoint.sh"]
+
+ENV MARIADB_USER=root
+ENV MARIADB_ROOT_PASSWORD=super_strong_password
+# Need to change the datadir to something else that /var/lib/mysql because the parent docker file defines it as a volume.
+# https://docs.docker.com/engine/reference/builder/#volume :
+#       Changing the volume from within the Dockerfile: If any build steps change the data within the volume after
+#       it has been declared, those changes will be discarded.
+RUN ["/usr/local/bin/docker-entrypoint.sh", "mariadbd", "--datadir", "/initialized-db", "--aria-log-dir-path", "/initialized-db"]
+
+FROM mariadb:latest
+
+COPY --from=builder /initialized-db /var/lib/mysql