Trying to get modules to work

ts/tower.ts

@@ -0,0 +1,14 @@
+import { TowerMap } from 'tower_map.js';
+
+export function main() {
+  document.body.style.margin = '0';
+  document.body.style.backgroundColor = 'black';
+
+  const container = document.createElement('div');
+  document.body.appendChild(container);
+  container.style.width = '100vmin';
+  container.style.height = '100vmin';
+
+  const map = new TowerMap(container);
+  map.draw();
+};