A basic counter UI to be integrated with a serverless backend using AWS Lambdas. The src folder contains UI resources and the server folder contains code for initializing the lambda functions and building the API gateway.
This UI was bootstrapped with Create React App.
To install all dependencies run either yarn install or npm install in your terminal
To build and start the UI, run npm start in your terminal
Build one lambda function based on decrementCounterLambda.js and one lambda function based on incrementCounterLambda.js
Generate your API Gateway based on the swaggerWithApiGatewayExtensions.yaml to save yourself some configuration time. Make sure to change the lambda URI for the increment and decrement pathway to your own path. If the function names are incrementCounter and decrementCounter you will only need to update the 12 digit account number to match your account (can be found in AWS account settings).
You can also build a simpler API with the swagger.yaml but don't forget to assign values to each of your CORS headers.
Assign your lambda functions to the appropriate routes in the API gateway.
Deploy your API, then copy/paste your API url into the appConfig.json file in the src folder.
This should get your serverless backend up and running!