@mrgrain/cdk-esbuild example

datasource-layer.ts

const datasourceLayer = new LayerVersion(this, id + 'DatasourceLayer', {
  code: new TypeScriptCode('./src/layers/datasource/datasource.ts', {
    buildOptions: {
      external: [
        'pg-native',
        'pg',
        'typeorm',
        'typeorm-aurora-data-api-driver',
      ],
      // keepNames: true,
      minify: true,
      platform: 'node',
      target: 'node14',
    },
    copyDir: './src/layers/datasource/',
  }),
  layerVersionName: `${this.stackName}-datasource-layer`,
})