Add Template to deploy forgejo.

This template allows deploying a forgejo en either Scaleway or Hetzner
(untested) without much knowledge about them.
It DOES require knowledge about Terragrunt and ansible. A wizard of
sorts is provided but it will not guarantee success without some
knowledge about the underlying technology.

ansible/roles/forgejo/templates/forgejo_backup.sh.j2

@@ -0,0 +1,33 @@
+#!/bin/bash
+# Forgejo Backup Script
+# Generated by Ansible
+
+set -e
+
+BACKUP_DIR="{{ forgejo_backup_path }}"
+TIMESTAMP=$(date +%Y%m%dT%H%M%S)
+LOG_FILE="/var/log/forgejo-backup.log"
+
+echo "[$(date)] Starting Forgejo backup..." | tee -a "$LOG_FILE"
+
+# Create database backup
+pg_dump -U {{ forgejo_db_user }} {{ forgejo_db_name }} | gzip > "$BACKUP_DIR/database-$TIMESTAMP.sql.gz"
+echo "[$(date)] Database backed up" | tee -a "$LOG_FILE"
+
+# Backup repositories
+tar -czf "$BACKUP_DIR/repositories-$TIMESTAMP.tar.gz" -C {{ forgejo_data_path }} git
+echo "[$(date)] Repositories backed up" | tee -a "$LOG_FILE"
+
+# Backup configuration
+tar -czf "$BACKUP_DIR/config-$TIMESTAMP.tar.gz" {{ forgejo_config_path }} {{ forgejo_base_path }}/docker-compose.yml
+echo "[$(date)] Configuration backed up" | tee -a "$LOG_FILE"
+
+# Backup data
+tar -czf "$BACKUP_DIR/data-$TIMESTAMP.tar.gz" -C {{ forgejo_data_path }} attachments lfs avatars
+echo "[$(date)] Data backed up" | tee -a "$LOG_FILE"
+
+# Clean old backups
+find "$BACKUP_DIR" -type f -name "*.gz" -mtime +{{ forgejo_backup_retention_days }} -delete
+echo "[$(date)] Old backups cleaned" | tee -a "$LOG_FILE"
+
+echo "[$(date)] Backup completed successfully" | tee -a "$LOG_FILE"