Serverless Express Typescript Starter Kit

A starter kit for building express apps using typescript deployed to AWS Lambda via serverless.

Getting Started

1. Clone the repo to your local machine.
2. Make sure you've got the required global tools by running:
   • npm install -g yarn ts-node
3. Restore packages by running yarn
4. Check everything works locally by running yarn test
5. Deploy to AWS by running yarn deploy
   • Hint set your AWS_PROFILE environment variable if not using the default
     • On fish: set -x AWS_PROFILE profile
     • On bash: export AWS_PROFILE=profile

Other commands:

• Check the serverless packaging works locally: yarn package
• Clean generated files left over from build: yarn clean

Writing Tests

Jest has been configured to run any file ending in *.test.ts, *.test.tsx or *.test.js. You can put these in the test folder, but they can also live alongside your code in the src folder if you prefer.

Infrastructure

Defaults:

• Doesn't use VPC
• Deployed to eu-west-1 (Ireland)
• Lambda timeout: 2 seconds

In the serverless.yml file uncomment from line 24 onwards to enable the hyper-paranoid security locked down setup. This uses private subnets in three availability zones, and does not include an internet gateway - which means the lambdas can't access the internet, and the only way they can be invoked is via API gateway.

Key Features when uncommented:

• No outbound connectivity at all.
• 3 private subnets.
• /24 block gives 250 addresses in each subnet
• 750 addresses available in total (limits lambda instances).