Moved code into src folder. Added build for component library.

rollup.tracker.config.mjs

@@ -0,0 +1,21 @@
+import 'dotenv/config';
+import buble from '@rollup/plugin-buble';
+import replace from '@rollup/plugin-replace';
+import { terser } from 'rollup-plugin-terser';
+
+export default {
+  input: 'src/tracker/index.js',
+  output: {
+    file: 'public/script.js',
+    format: 'iife',
+  },
+  plugins: [
+    replace({
+      '/api/send': process.env.COLLECT_API_ENDPOINT || '/api/send',
+      delimiters: ['', ''],
+      preventAssignment: true,
+    }),
+    buble({ objectAssign: true }),
+    terser({ compress: { evaluate: false } }),
+  ],
+};