Add Tickets domain for the voucher-based ticket shop (#8)

Reviewed-on: #8
Co-authored-by: Patrick Mueller <patrick@mueller-patrick.tech>
Co-committed-by: Patrick Mueller <patrick@mueller-patrick.tech>

src/models/tickets/Tickets.db.ts

@@ -0,0 +1,20 @@
+import * as dotenv from 'dotenv';
+
+const mariadb = require('mariadb');
+
+dotenv.config();
+
+export namespace NachklangTicketsDB {
+	const pool = mariadb.createPool({
+		host: process.env.DB_HOST,
+		user: process.env.DB_USER,
+		password: process.env.DB_PASSWORD,
+		database: process.env.TICKETS_DB,
+		connectionLimit: 5,
+		autoCommit: false
+	});
+
+	export const getConnection = async () => {
+		return pool.getConnection();
+	};
+}