If number of images are less then serve them as static files hosted in a server like nodejs on Aws ec2 t2.micro (free tier for 1 year) or t2.small instance. If images are more then I'd suggest to serve them through Aws S3
Shouldn't I generate them dynamically. Because facebook scraper is going to scrape only once. Is this good idea or not? or Should i use s3 or efs (efs is cheap isn't it)