Add postgres backups for plausible

ansible/roles/plausible/files/docker-compose.yml

@@ -45,3 +45,18 @@ services:
     environment:
       - POSTGRES_PASSWORD=plausible
       - POSTGRES_USER=plausible
+
+  db-backups:
+    image: prodrigestivill/postgres-backup-local:12-alpine
+    restart: unless-stopped
+    volumes:
+      - /scratch/db-backups:/backups
+    depends_on:
+      - db
+    environment:
+      - POSTGRES_HOST=db
+      - POSTGRES_PASSWORD=plausible
+      - POSTGRES_USER=plausible
+      - POSTGRES_DB=plausible
+      - BACKUP_KEEP_MONTHS=1
+      - BACKUP_KEEP_WEEKS=1