feat(backup): Add pre and post commands for PostgreSQL database backup in immich-backup service

Author: AdrienPoupa

immich/docker-compose.yml

@@ -76,6 +76,8 @@ services:
     environment:
       RESTIC_BACKUP_SOURCES: /data
       RESTIC_BACKUP_ARGS: --tag immich --exclude /data/thumbs --exclude /data/encoded-video --exclude /data/backups
+      PRE_COMMANDS: docker exec immich_postgres pg_dumpall -U postgres | gzip > /data/db-dump.sql.gz
+      POST_COMMANDS_SUCCESS: rm -f /data/db-dump.sql.gz
     volumes:
       - ${IMMICH_UPLOAD_LOCATION}:/data
       - ${CONFIG_ROOT:-.}/immich/postgresql:/postgresql:ro
@@ -87,12 +89,6 @@ services:
     restart: always
     profiles:
       - immich-backup
-    command: >
-      sh -c '
-      export PRE_COMMANDS="docker exec immich_postgres pg_dumpall -U postgres | gzip > /data/db-dump.sql.gz";
-      export POST_COMMANDS_SUCCESS="rm -f /data/db-dump.sql.gz";
-      exec /entry.sh
-      '
 
 volumes:
   immich-model-cache: