The browser sample does not refresh when code is updated

[trivikr]

Describe the bug
The browser sample does not refresh when code is updated.

To Reproduce
Follow steps for browser https://github.com/aws-samples/aws-sdk-js-tests#browser

• Make some modification in code and save. For example, add Limit while calling listTables:

 const getV2Response = async (clientParams) => {
   const client = new AWS.DynamoDB(clientParams);
-  return client.listTables().promise();
+  return client.listTables({ Limit: 1 }).promise();
 };
 
 const getV3Response = async (clientParams) => {
   const client = new DynamoDB(clientParams);
-  return client.listTables({});
+  return client.listTables({ Limit: 1 });
 };

• Note that the browser page does not reload, and have to be manually reloaded.

Expected behavior
The page opened in browser should reload when code is changed in the repository.

[trivikr]

This bug was introduced when we switched from webpack to esbuild in #88

We're using native esbuild serve API which does not yet support hot module reloading.

[trivikr]

One solution is to write custom esbuild config to watch and bundle files, and use third party server to hot reload.

Example: https://github.com/zaydek/esbuild-hot-reload