feat: add Docker support with deployment scripts and database backup functionality

scripts/vps-backup-db.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SSH_USER="${SSH_USER:-syntaxbullet}"
+VPS_HOST="${VPS_HOST:-srv1.bayerischer-mittelstandspreis.de}"
+VPS_PORT="${VPS_PORT:-22}"
+SSH_KEY="${SSH_KEY:-$HOME/.ssh/bmp-vps-deploy}"
+APP_ROOT="${APP_ROOT:-/var/www/bmp-website}"
+APP_DOMAIN="${APP_DOMAIN:-srv1.bayerischer-mittelstandspreis.de}"
+
+SSH_TARGET="$SSH_USER@$VPS_HOST"
+COMPOSE_FILE="$APP_ROOT/current/deploy/vps/docker-compose.yml"
+
+ssh -i "$SSH_KEY" -p "$VPS_PORT" "$SSH_TARGET" "
+  set -e
+  backup_dir='$APP_ROOT/backups'
+  backup_file=\"\$backup_dir/content-\$(date +%Y%m%d-%H%M%S).db\"
+
+  sudo install -d -o '$SSH_USER' -g '$SSH_USER' \"\$backup_dir\"
+
+  restart_app() {
+    APP_ROOT='$APP_ROOT' APP_DOMAIN='$APP_DOMAIN' sudo docker compose -f '$COMPOSE_FILE' up -d app >/dev/null
+  }
+
+  trap restart_app EXIT
+  APP_ROOT='$APP_ROOT' APP_DOMAIN='$APP_DOMAIN' sudo docker compose -f '$COMPOSE_FILE' stop app >/dev/null
+  cp -p '$APP_ROOT/shared/content.db' \"\$backup_file\"
+  restart_app
+  trap - EXIT
+
+  ls -lh \"\$backup_file\"
+"