We have 90 optimized images that we need to upload to our production server hosted in Magento Cloud, the problem is that Magento Cloud just provides read-access only, is there a proper fast way to do this process without having to upload the images one by one on the admin?
Go to your magento directory on your local machine.
magento-cloud environment:checkout yourmaster-branch
copy/swap your images to proper directory
magento-cloud redeploy -e yourmaster-branch