basic config for jest and dynamodb offline

jest-dynamodb-config.js

// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
module.exports = async () => {
  /* eslint-disable global-require */
  const serverless = new (require('serverless'))();

  await serverless.init();
  const service = await serverless.variables.populateService();
  const resources = service.resources.Resources;

  const tables = Object.keys(resources)
    .map((name) => resources[name])
    .filter((r) => r.Type === 'AWS::DynamoDB::Table')
    .map((r) => r.Properties);


  return {
    tables,
    port: 8000,
  };
};