Adding a Global Layer To Your SAM Template

template.yaml

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Globals:
  Function:
    Runtime: nodejs14.x
    Architectures:
      - arm64
    Tracing: Active
    Timeout: 3
    Handler: index.handler
    Layers:
      - !Ref DependencyLayer

Resources:
  DependencyLayer:
    Type: AWS::Serverless::LayerVersion
    Metadata:
      BuildMethod: nodejs14.x
    Properties:
      LayerName: dependency-layer
      ContentUri: layers/
      CompatibleRuntimes:
        - nodejs14.x