[Feed] [BE] Pagination of post documents

[katsukixyz]

Context

Currently, our feed backend request post.getFilteredPosts fetches all posts that match a given set of filters. However, when there are lots of posts, we want to be able to incrementally fetch data to make sure we're not rendering too many unnecessary elements.

Requirements

Modify post.getFilteredPosts to take in an additional value:

• pageNumber: number

Define a constant DOCUMENTS_PER_PAGE with a value representing the number of documents that each page would have. Your modified query should use this value to get all documents on the pageNumberth page.

TBD

Acceptance Criteria

PM

• Product-specific requirements

EM

• Engineering-specific requirements

Designer

• Design-specific requirements