Refactor Gitea and SSH configurations, update backup scripts, and enhance Nginx settings

- Updated SSH configuration for Gitea to disable banner and TTY, and modified the AuthorizedKeysCommand.
- Simplified gitea-shell script to directly call the k8s_gitea_shell command with required parameters.
- Removed unused gitea-auth script from playbook_gitea.yml.
- Updated systools_version in playbook_systools.yml to 0.4.5.
- Enhanced ssh_locker_helper to copy redirect URL to clipboard based on OS.
- Added a new script test_imaps for IMAP testing.
- Updated Terraform configurations for various applications, including:
  - Added a backup script for MariaDB with retention policy.
  - Changed Gitea version to 1.24-rootless and adjusted SSH settings.
  - Updated Nginx configurations to log errors and access to stderr/stdout.
  - Refactored services to use ClusterIP type and adjusted security contexts for deployments.
  - Added temporary storage for applications using empty_dir.
  - Enhanced backup.sh scripts for better error handling and logging.

terraform/modules/db/mariadb/resources/backup.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+if [ -z "$MARIADB_USER" ] || [ -z "$MARIADB_PASSWORD" ] || [ -z "$MARIADB_DATABASE" ]; then 
+  echo "MARIADB_USER, MARIADB_PASSWORD and MARIADB_DATABASE must be set"
+  exit 1
+fi
+if [ -z "$APP_NAME" ]; then
+  echo "APP_NAME must be set"
+  exit 1
+fi
+if [ -z "$BACKUP_RETENTION" ]; then
+  echo "BACKUP_RETENTION must be set"
+  exit 1
+fi
+
+echo "Creating backup of MariaDB database for app: $APP_NAME"
+/usr/bin/mariadb-dump --single-transaction -h mariadb -u $MARIADB_USER -p$MARIADB_PASSWORD $MARIADB_DATABASE | gzip > /backup/$APP_NAME-sql-`date +"%Y%m%d"`.sql.gz
+
+BACKUP_FILE_PATTERN="$APP_NAME-sql-*.sql.gz"
+echo "Removing old backups matching pattern: $BACKUP_FILE_PATTERN"
+find /backup -type f -name "$BACKUP_FILE_PATTERN" -mtime +$BACKUP_RETENTION | xargs --no-run-if-empty rm