This is the bitbucket pipelines yml file.

bitbucket-pipelines.yml

image: lambci/lambda:build-nodejs6.10
pipelines:
   default:
     - step:
         name: Build and package
         script:
           - apt-get update && apt-get install -y zip
           - npm install
           - npm install node-lambda -g
           - zip -r code.zip ./node_modules handler.js package.json
         artifacts:
           - code.zip
     - step:
         name: Update Lambda code
         script:
           - pipe: atlassian/aws-lambda-deploy:0.4.3
             variables:
               AWS_ACCESS_KEY_ID: ${AWS_ACCESS_KEY_ID}
               AWS_SECRET_ACCESS_KEY: ${AWS_SECRET_KEY_ID}
               AWS_DEFAULT_REGION: 'us-east-2'
               FUNCTION_NAME: '<FUNCTION_NAME>'
               COMMAND: 'deploy'
               ZIP_FILE: 'code.zip'
         caches:
         - node