[Github Action] AWS CodeDeploy Succeeded but in EC2 created modified file

Hi everyone, i'm setting up the Github Action, AWS EC2, CodeDeploy. All the configuration seems working well. But excepts one thing. I can not understand and how can i solve it. If someone have experiences about this please help me.

I'm using:
- EC2 Rhel 8
- Node project (VueJs framework)

This is my cicd.yml file
```
on:
push:
branches:
- paymentV2

name: Deploy VueJS to Amazon ECS
#on: [push]

jobs:
deploy:
name: Deploy
runs-on: ubuntu-latest
strategy:
matrix:
node-version: ['12.x']
appname: ['staging-aws-codedeploy']
deploy-group: ['staging']
repo: ['project/MyProject']

steps:
- uses: actions/checkout@v2

# Configure AWS credentials
- name: Configure AWS credentials
uses: aws-actions/configure-aws-credentials@v1
with:
aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
aws-region: ap-southeast-1

# Deploy to AWS
- name: Deploy to AWS
run: |
aws deploy create-deployment \
--application-name ${{ matrix.appname }} \
--deployment-config-name CodeDeployDefault.OneAtATime \
--deployment-group-name ${{ matrix.deploy-group }} \
--file-exists-behavior OVERWRITE \
--description "GitHub Deployment for the ${{ matrix.appname }}-${{ github.sha }}" \
--github-location repository=${{ matrix.repo }},commitId=${{ github.sha }}
```
This is my appspec.yml
```
version: 0.0
os: linux
files:
- source: /
destination: /var/www/MyProject
hooks:
ApplicationStart:
- location: scripts/application_start.sh
timeout: 300
runas: root
#scripts/application_start.sh
#cd /var/www/MyProject
#npm run build
```
This is the log from Github action & CodeDeploy AWS

I've tried editing the **Vision.vue** file and created the pull request on Github. Everything was working well. But one thing i'm confusing is why the modified file is existed. Please refer the image below


=> What am i expected is the modified file shouldn't have existed. I thought that Github should be automatically run **git pull** to get all new source code.
I've some more researched and found --file-exists-behavior with OVERWRITE but it seems not working as i want.
https://docs.aws.amazon.com/cli/latest/reference/deploy/create-deployment.html

==> Once again, i have no experience about CD by Github action & CodeDeploy. Everyone please help me and advice me the right thing. Thank you so much.