Adding of database initialization.

docker/database/Dockerfile

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+FROM postgres:13
+RUN localedef -i fr_FR -c -f UTF-8 -A /usr/share/locale/locale.alias fr_FR.UTF-8
+ENV LANG fr_FR.utf8

docker/database/scripts/00-init_env.sh

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+#!/bin/bash
+set -euo pipefail
+IFS=$'\n\t'