github-action VS serverless-bundle

Our deploys don't deploy on merges to main. For this though, we can just use the official Serverless Github Action. Alternatively, we could purchase a license to the Serverless Dashboard, but this option is a bit more expensive, and we're not using all of its features on this project. However, we've used this on other client projects, and it really helped us manage and monitor our deployments.

Now that we have our Serverless Deployment script ready, we can deploy this to AWS Lambda using this script with Github Actions.

Link da action no github https://github.com/serverless/github-action

As you can see in the above handler.js file, we're getting CommonJS instead of modern JavaScript or TypeScript. To get these, you need webpack or some other bundler. serverless-webpack exists if you want full control over your ecosystem, but there is also serverless-bundle that gives you a set of reasonable defaults on webpack 4 out of the box. We opted into this option to get us started quickly.

One of the most important aspects of serverless development is keeping an eye on your bundle sizes and to reduce cold start times on Lambda. Keeping this in mind, the template utilizes serverless-esbuild and serverless-analyze-bundle-plugin to provide function analysis out-of-the-box. I opted for serverless-esbuild over serverless-bundle for a few reasons:

We use the package.json at the project root to install the dependencies that will be shared across all the services. For example, if you are using serverless-bundle to optimally package the Lambda functions, or using the serverless-plugin-warmup to reduce cold starts, they should be installed at the root level. It doesn’t make sense to install them in each and every single service.