#714 Extract content from ePUB storybook
#714 Extract content from ePUB storybook

- Center-align images in storybook paragraphs

elimu-ai/webapp,literacyapp-org/literacyapp-web,literacyapp-org/literacyapp-web,elimu-ai/webapp,literacyapp-org/literacyapp-web,elimu-ai/webapp,elimu-ai/webapp,literacyapp-org/literacyapp-web