(AWS CDK) set up pipeline

I have used aws cdk to create a lambda function and now I want to set up a code pipeline for CICD. but I have not clue how to make it works since my lambda has use a 3rd party dependency.

The is my lambda stack

import { Duration, Stack, StackProps } from 'aws-cdk-lib';
import * as cdk from 'aws-cdk-lib';
import { Code, LayerVersion, Runtime } from 'aws-cdk-lib/aws-lambda';
import { NodejsFunction } from 'aws-cdk-lib/aws-lambda-nodejs';
import { Construct } from 'constructs';

export class Test3Stack extends Stack {
  constructor(scope: Construct, id: string, props?: StackProps) {
    super(scope, id, props);

    const axiosLayer = new LayerVersion(this, 'axios', {
      code: Code.fromAsset('./resources/layers/axios'),
      compatibleRuntimes: [Runtime.NODEJS_16_X],
      description: 'axios'
    })


    const db = new NodejsFunction(this, 'axiosLambda', {
      memorySize: 1024,
      timeout: Duration.seconds(300),
      runtime: Runtime.NODEJS_16_X,
      entry: `./resources/lambdas/index.ts`,
      handler: 'handler',
      bundling: {
        minify: false,
        externalModules: ['axios'],
        preCompilation: true
      },
      layers: [axiosLayer]
    })


    new cdk.CfnOutput(this, 'phpcall', {
      value: db.functionName,
    })



  }
}

This is my lambda folder structrue

After I adding below 2 stack and change the bin folder which the cdk entry point to the pipeline stack it will not work... I am not sure why

My pipeline stack

export class PipelineStack extends Stack {
    constructor(scope: Construct, id: string, props?: StackProps) {
        super(scope, id, props)

        // Creates a CodeCommit repository called 'WorkshopRepo'
        const repo = new codecommut.Repository(this, 'phpcall-repo', {
            repositoryName: "Php-call-repo"
        })
        const pipeline = new CodePipeline(this, 'Pipeline', {
            pipelineName: 'php-call-pipeline',
            synth: new CodeBuildStep('SynthStep', {
                input: CodePipelineSource.codeCommit(repo, 'main'),
                installCommands: [
                    'npm install -g aws-cdk',
                    'npm install axios'
                ],
                commands: [
                    'npm ci',
                    'npm run build',
                    'npx cdk synth'
                ]
            }
            )
        });
        const deploy = new PipelineStage(this, 'Deploy');
        const deplyStage = pipeline.addStage(deploy)

    }

}

my stage stack

import { Stage, StageProps } from 'aws-cdk-lib'
import { Test3Stack } from './test3-stack'
import { Construct } from 'constructs'


export class PipelineStage extends Stage {
    constructor(scope: Construct, id: string, props?: StageProps) {
        super(scope, id, props);

        new Test3Stack(this, 'php-call-service')
    }
}