change-cover-name.py

import json
import boto3

def lambda_handler(event, context):
    page_name = event['queryStringParameters']['page']
    cover_name = event['queryStringParameters']['cover']
    
    print(page_name)
    
    ssm_client = boto3.client('ssm')
    response = ssm_client.send_command(
            DocumentName='AWS-RunShellScript',
            Parameters={
                'commands': [
                    f"sed -i 's/Cover-Name/{cover_name}/' /var/www/html/{page_name}.html"
                ]

            },
            InstanceIds=['i-<instance-id>']
        )
        
    return {
        'statusCode': 200,
        'headers': {
            'Access-Control-Allow-Headers': 'Content-Type',
            'Access-Control-Allow-Origin': '*',
            'Access-Control-Allow-Methods': 'OPTIONS,POST,GET'
        },
        'body': json.dumps({
            "msg": "hello",
            "page": page_name,
            "cover": cover_name
        })
    }