lambda.js

exports.handler = (event, context, callback) => {
    var responseCode = 200;

    var responseBody = {
        received: true
    };
    
    var response = {
        statusCode: responseCode,
        headers: {
            "x-custom-header" : "custom header value"
        },
        body: JSON.stringify(responseBody)
    };
    context.succeed(response);
};