Create Node.js layer to simplify connecting AWS Lambda to PostgreSQL

create-layer.sh

#!/usr/bin/env bash

#https://medium.com/coinmonks/connecting-aws-lambda-node-js-to-redshift-or-postgresql-try-aws-lambda-layers-78e60c27f39b

#Note the name of the folder *must* be nodejs, see explanation here:
#https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html
mkdir nodejs
cd nodejs
npm init -y
npm install --save pg
cd ..
zip -r nodejs.zip nodejs