backend api, swagger, tooling, frontend skeleton

.env.example

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+# Backend
+PORT=8080
+DATABASE_DRIVER=sqlite3
+DATABASE_URL=file:./data/matosbox.db?_fk=1
+ATTACHMENTS_DIR=./data/pieces_jointes
+BACKUP_DIR=./data/backups
+MAX_UPLOAD_MB=50
+
+# App
+TIMEZONE=Europe/Paris