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/postgres_backup.sh.j2

@@ -0,0 +1,24 @@
+#!/bin/bash
+# PostgreSQL Backup Script
+# Generated by Ansible
+
+set -e
+
+BACKUP_DIR="{{ forgejo_backup_path }}"
+TIMESTAMP=$(date +%Y%m%dT%H%M%S)
+LOG_FILE="/var/log/postgres-backup.log"
+
+# Ensure backup directory exists
+mkdir -p "$BACKUP_DIR"
+
+echo "[$(date)] Starting PostgreSQL backup..." | tee -a "$LOG_FILE"
+
+# Create database backup
+sudo -u postgres pg_dump {{ forgejo_db_name }} | gzip > "$BACKUP_DIR/postgres-$TIMESTAMP.sql.gz"
+
+echo "[$(date)] PostgreSQL backup completed: postgres-$TIMESTAMP.sql.gz" | tee -a "$LOG_FILE"
+
+# Clean old PostgreSQL backups (keep last {{ forgejo_backup_retention_days }} days)
+find "$BACKUP_DIR" -type f -name "postgres-*.sql.gz" -mtime +{{ forgejo_backup_retention_days }} -delete
+
+echo "[$(date)] Old PostgreSQL backups cleaned" | tee -a "$LOG_FILE"