Deploy serverless for selenium

lambda_selenium_template.yaml

#https://github.com/smithclay/lambdium/blob/master/template.yaml
AWSTemplateFormatVersion : '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: selenium with headless chromium
Resources:
  DeploymentPermission:
    Type: "AWS::Lambda::LayerVersionPermission"
    Properties:
      Action: lambda:GetLayerVersion
      LayerVersionArn: !Ref ChromiumLayer
      Principal: '*'

  ChromiumLayer:
    Type: AWS::Serverless::LayerVersion
    Properties:
      LayerName: chromium-selenium-layer
      Description: Headless Chromium and Selenium WebDriver
      ContentUri: ./layer
      CompatibleRuntimes:
        - nodejs8.10
        - python3.7
        - python2.7
        - go1.x
        - java8
      LicenseInfo: 'MIT'
      RetentionPolicy: Retain

  Lambdium:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      Runtime: nodejs8.10
      FunctionName: lambdium
      Description: headless chromium running selenium
      # This needs to be fairly large: chromium needs a lot of memory
      MemorySize: 1156
      Timeout: 20
      Layers:
        - !Ref ChromiumLayer
      Environment:
        Variables:
          CLEAR_TMP: "true"
      CodeUri: ./src