A serverless example for configuring different vpc per stage

serverless-toggle-vpc-example.yml

service: serverless-toggle-vpc-example

provider:
  runtime: nodejs10.x
  name: aws
  vpc: ${self:custom.vpc.${self:provider.stage}}

custom:
  vpc:
    dev:
      # If you don't want to run Lambda under a Vpc, then just give it an empty array
      securityGroupIds: []
      subnetIds: []

    # You can add more stages here

    prod:
      securityGroupIds:
        Fn::Split:
          - ','
          - ${file(secrets.${self:provider.stage}.yml):VPC_SECURITY_GROUP_IDS}
      subnetIds:
        Fn::Split:
          - ','
          - ${file(secrets.${self:provider.stage}.yml):VPC_SUBNET_IDS}