Gitea: configure backups again

files/gitea/backup.sh.j2

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -eu
+set -o pipefail
+
+echo "Gitea: backup data with gitea dump"
+
+(cd "{{ base_dir }}" && \
+    docker compose exec \
+        -u "{{ user_create_result.uid }}:{{ user_create_result.group }}" \
+        -w /backups gitea_app \
+        gitea dump -c /data/gitea/conf/app.ini \
+)
+
+
+echo "Gitea: remove old backups"
+
+keep-files.py "{{ backups_dir }}" --keep 3
+
+
+echo "Gitea: done."