# Postgres for the Scrabble contour, extended with pgBackRest for continuous WAL
# archiving and point-in-time recovery. pgBackRest must live in the database container
# because Postgres runs archive_command in-process; the scheduled base backups and the
# manual restore drills invoke the same binary through `docker exec`, inheriting the
# repository configuration from the container environment.
#
# Archiving is enabled only on the production main host, where the prod overlay
# (docker-compose.prod.yml) sets archive_mode and supplies the S3 repository. On the test
# contour this image behaves exactly as a plain postgres:17-alpine. See deploy/README.md
# (point-in-time recovery).
FROM postgres:17-alpine
RUN apk add --no-cache pgbackrest