add guard to dbService checking for directory existence

src/lib/server/dbService.ts

@@ -1,3 +1,12 @@
 import Database from 'better-sqlite3';
+import fs from 'fs';
+import path from 'path';
 
-export const db = new Database('./src/lib/data/tatort.db');
+const fullPath = './src/lib/data/tatort.db';
+const dir = path.dirname(fullPath);
+
+if (!fs.existsSync(dir)) {
+	fs.mkdirSync(dir);
+}
+
+export const db = new Database(fullPath);