Not able to deploy code to ec2 instance using aws code deploy

Question

I'm trying to deploy my code to ec2 instance using aws codedeploy and github, but the logs on my ec2 instance at:

/var/log/aws/codedeploy-agent/codedeploy-agent.log

says :

The CodeDeploy agent did not find an AppSpec file within the unpacked revision directory at revision-relative path "appspec.yml". The revision was unpacked to directory "/opt/codedeploy-agent/deployment-root/a018a999-b075-4d7a-a010-d08bd93ecbfb/d-3B1NFWVEL/deployment-archive", and the AppSpec file was expected but not found at path "/opt/codedeploy-agent/deployment-root/a018a999-b075-4d7a-a010-d08bd93ecbfb/d-3B1NFWVEL/deployment-archive/appspec.yml

My flow goes like this:-

code on local machine -> push to github -> aws codedeploy -> aws ec2 instance

Here's my appspec.yml file code:-

version: 0.0
os: linux
files:
  - source: "**/*"
    destination: /var/www/html/office_new
hooks:
 ApplicationStop:
   - location: scripts/stop_server.sh
     timeout: 300
     runas: ubuntu
 ApplicationStart:
   - location: scripts/start_server.sh
     timeout: 300
     runas: ubuntu

Here's my folder structure:-

<my-root-folder>/
    ├── folder_1/
    │   ├── file_1
    │   ├── file_2
    │   └── file_3
    ├── folder_2/
    │   ├── file_1
    │   ├── file_2
    │   └── file_3
    ├── appspec.yml
    └── otherfiles

Any help will be greatly appreciated thanks.