Gruntfile.js

require('dotenv').config();
module.exports = function (grunt) {
  grunt.loadNpmTasks('grunt-aws-lambda');

  grunt.initConfig({
    lambda_invoke: {
      default: {
        options: {
          file_name: 'index.js'
        }
      }
    },
    lambda_package: {
      default: {
        options: {
          include_files: ['app/**'],
        },
      },
    },
    lambda_deploy: {
      default: {
        arn: process.env.AWS_LAMBDA_ARN,
        options: {
          accessKeyId: process.env.AWS_ACCESS_KEY_ID,
          secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY,
          region: process.env.AWS_REGION,
          aliases: process.env.LAMBDA_STAGE
        }
      }
    }
  });

  grunt.registerTask('default', ['lambda_invoke']);
  grunt.registerTask('deploy', ['lambda_package', 'lambda_deploy']);
};

package.json

{
  "name": "lambda-cloudinary-tunnel",
  "version": "1.0.0",
  "description": "Lambda function to upload images to cloudinary",
  "main": "index.js",
  "directories": {
    "test": "test"
  },
  "scripts": {
    "test": "mocha"
  },
  "author": "Sergey Monin",
  "license": "BSD",
  "devDependencies": {
    "grunt": "^0.4.5",
    "chai": "^3.5.0",
    "grunt-aws-lambda": "0.13.0",
    "mocha": "^3.1.2",
    "mocha-multi": "^0.9.1"
  },
  "dependencies": {
    "aws-sdk": "^2.4.13",
    "bluebird": "^3.4.7",
    "cloudinary": "^1.4.1",
    "dotenv": "^4.0.0"
  }
}